I guess it's the same clipping I had, just occurring in a different place because track dimensions are different. Will need to build it and run a few tests, probably today. Will also try messing raising honey level on the old world backup to see if place where you exit the honey affects where you clip into. Maybe there's some brief glitch when transitioning from liquids.
As for why you're skipping the plates(I hope you meant 21 plates, based on wires), I might have an idea but it's pretty far fetched. Teleportation area seems to be less than 3 tiles. If you place a pressure plate above leftmost tile, you can slowly walk(npcs seem to walk slowly enough to do it too) into the plate from the left you will trigger it(you'll hear the 'click' sound) without triggering teleporter below. If you trigger teleporter from that exact position with a switch, it won't teleport you either, so it's not a pressure plate bug. I doubt you're landing on that magic pixel several times in a row, but they might have some other weird quirks. Just add more and hope they start catching you guess.
I think i understand this bit now
Water is doing the same thing, but only without the Celestial Shell. (it removes the movement penalty in water)
It was referencing this?
I think i'll try to build a water based accelerator to see if that helps. Would have to readjust dimensions for water physics though, and that will probably be alot of trial and error or luck.
You're right, I didn't think about that. Guess all my water based tracks were still jumping powered, and I switched to swimming and honey at the same time. Either way, I didn't get around to build water based one, so thank you for saving me time on that mistake.
Thanks for mentioning about fishron wings too. Wings seem to have better upwards maximum speed, but might have slower acceleration. Will need to try switching to wings + frog legs in liquid at some point. Would have to remove some honey to be able to breathe though.
Currently I'm working on a design, that will hopefully eliminate issues caused by collision and clipping. It's basically a pool of honey suspended in bubble blocks. Two portal surfaces(both vertical) are ghosted from both sides(can you ghost from top and bottom?). Teleporters are actuated and stand on platforms(might give me some slowdown but shouldn't). Trying to get teleporter coverage right so I can begin testing.
[doublepost=1463425953,1463407566][/doublepost]I think I might have figured out why this happens
, and amazingly enough it's our fault 
Correct me if I'm wrong, but game handles slopes and 1 block high elevations by basically clipping you into it, and letting the physics handle it on the next tick. If it's a sloped block, physics shifts your position in 1 tick. If it's a regular block or a half block game seems to do this gradually. Everything seems perfectly fine. We run towards the slope, it hoiks us up and we keep running. Except that we're moving pretty fast. And after slope ends, instead of getting stuck inside a sloped block, we get stuck in a regular one. As long as we're only 1 block deep, we're mostly fine. Physics will gradually push us up. It will probably even allow us to clip our feet into adjacent blocks so we can keep moving without stopping. By the way, we just clipped under our 1st teleporter trigger. Here comes 2nd trigger. Will physics push us up in time to trigger it? Whee, it did it, and we trigger the teleporter on the 2nd trigger. Everything is fine. Except that our feet were still clipped inside the floor when we teleported. And we arrived at the other teleporter with our feet clipped inside the floor. Everything's fine! We still have time to recover, there's some blocks one the way to the slope. Except that we're going pretty fast.
(See attachment 1)
Hello wall. Hello portal.
(See attachment 2)
Whoa, where am I and where did my speed go?
Thanks for reading, you've been a wonderful audience!
I'm sure it was insufferable
Anyway, see Attachment 3
This quick alteration basically solves detection problem on recovery teleporters until you start warping in really long steps, in which case, just build longer recovery tunnel and start adding more teleporters. It also tries to tackle warping inside the slope, but failing miserably. In theory those lower hoik teeth don't actually do anything because you're no longer clipping up from under the teleporter. Solution
might be to have a 1 tile thick slope and having two rows of recovery teleporters down there, hooked to some engine.
It was fun figuring it out. Please do tell me if something doesn't fit this theory.
Now I'll have to decide if should continue working on collisionless one, or switch back to this kind. Tough choices
Edit1: P.S. I meant no disrespect to terraria's engine. It's pretty amazing
Edit2: Just confirmed for myself that portals have a cooldown. They also seem to have individual cooldowns on each portal but not quite sure on that yet. Also, it seems wings/double jumps/etc need more than 1 tick on the ground to reset.
Final edit: I give up. I think that problem with slope design was that eventually you'd clip into slope deep enough that you'd be inside 3 hoik teeth and rightmost would block you from going up. Then the portal cooldown would expire and teleport you, adding 1mph to your current 0mph. You place a hoik tooth pointing down and right under that it would save you, pushing you to bottom recovery teleporters. Or you could just try to angle your path that at most you'd ever be hitting 2 topmost slope tiles. I tried both approaches. Then gave up slopes. Then gave up collisions. Then just gave up. I think I might be hitting those oscillation things, but it's impossible to see in honey. I made some attempts to shift or break them with timer teleporting me to a different track with slightly different lengths, and it did nothing. At this point I'm not sure of anything anymore. Clipping and warping might not have ever been an issue. I'll just stick to hitting things that take damage when I hit them.
(included the wires so you can see where the teleporters are)
you have no clue what's possible I've more than tripled your speeds I'm sorry guys my speed is up to 700+ mph 
and it's without the portal technic 