The Tail o’ Tix uses the incorrect attachment for it’s accessory type, causing it to behave incorrectly on the avatar.

The issue becomes much more apparent when viewing the falling animation from the side.

The Tail o’ Tix appears to float in many cases, made more obvious depending on the animation pack you’re using.
When viewing the item in explorer, you can see that the Tail o’ Tix uses “HatAttachment” instead of “WaistFrontAttachment” (which is what Grey Cat Tail, the other item shown in the GIFs, uses), causing it to follow the head instead of the waist.
