eum... a not obeying docked entity on the lose!

[HolyCookie]

So i was playing a bit with the rails and well.....
one of my (lets call em carts) decided to take a break......

 

[CaptainTaz]

I can't tell what's wrong in this picture...

 

[HolyCookie]

I can't tell what's wrong in this picture...

neither can I
i was in a hurry whil creating the thread.
ill just explain:
a little looped chain of rails, it has 5 docked cores on it (only core and rail docker)
the rail speed on max.
1 add a sixth core on the rails and it didn't move, it was fused with the other core behind him.
after some time you couldn't see that they were fused anymore as if the texture repaired itself.
now its there, found a glitch?