Expected Behavior

1. Not being able to pull multiple carts/wagons at once.
2. Not being able to link carts/wagons.
3. Combination of 1 and 2 not being able to be done, linking carts/wagons to others that already have one linked to them.

Actual Behavior

You can do all of those things, which can look very glitchy and might not be intended.
Aside of that, if you stop pulling a cart with multiple carts behind that one, they will occasionally fly up in the air for a very short moment.

Steps to Reproduce

• Spawn wagon/cart.
  -Right click wagon/cart to pull it yourself.
• Spawn another cart/wagon.
  -Shift-Right Click to ride the next cart/wagon.
  You have now linked the one you were pulling and the one you are sitting in.
  Rinse and repeat, even link multiple to one for extra glitchy movement and behavior.

Version of Minecraft, version of Animania, Single Player or Server

Minecraft 1.12.2
Forge 1.12.2-14.23.4.2705
Animania 1.5.1.1
Singleplayer, but i bet multiplayer is even worse.

Screenshots encouraged

Already posted one in the discord, but i will put a different one here.

QUICK-EDIT:
Here you can see the covered wagon and a couple of carts briefly lifting themselves from the ground trying to follow the cart i linked them to.

Yeah, that's a bug. Thanks for the detailed description and examples.