Advanced Skeleton rigs

I’ve been trying to get some advanced skeleton rigs into UE4 and have been having some issues. I’m extremely new to UE4 mind you.

AdvSkeleton seems to have no issues going into unity!interactiveskeletonlucy/m9jyu
I figure I must be doing something wrong.

When importing animation for my character, he is lying flat so the y/z seems to be wonky for sure. There also seems to be no animation on the leg joints.

I’ve been trouble shooting away on this and I’ve managed to somewhat solve the axis flip by “enabling root motion”. The legs though, remain static. Also, his jaw seems to go wonky. The 2nd gif is from FBX preview, where all seems to be in order.