[1.8.9] Entity Movement? [solved]

I'm having trouble figuring out how to make an entity that can both walk and fly.

I've been able to implement the flying part, and the wander ai still works on the ground. For some reason, the entity refuses to walk up 1 block when wandering on the ground. With a lead, the entity follows until it hits something that it would need to move vertically upwards to get across and then just doesn't move.

The entity can still fall (when it isn't flying), and vertical drops will not hinder the entity movement.

Does anyone see anything I'm not seeing immediately? If not, I'll just keep trying.

I am confused, and would like to know if there are any examples where this is done properly that I could try to understand?

EDIT:

It turns out it was a bounding box issue. The set size function I was using to change the bounding box messed with the move function in the Entity class.

So as long as both the x and y values are less than 2, it works fine.

Thanks.