Issue with Entrance Animation (Fly In)

Hi everyone!

This seems like the right place to post this. So, I was creating several buttons which would have objects fly in from the left when in hover state, and fly out to the right. The first three objects have the full animation flying in from the left (from outside of the slide, and then exiting to the right side completely out). But on the 4th, 5th, etc... objects/hover states, the fly in from the left seems too short. It does not start from outside of the slide, but somewhere in the middle, mixing up the animation effect. Further I move to the right with my objects (4th. 5th, etc), the fly in from the left almost turns into a fly in from the right.

Here's the example, easier to understand.

Any advice?