Unreal importing animations from blender too many frames

HI, I’ve been having huge problems with animations imports from blender.
Animations seem to be imposible to import individually, as then nothing will be imported, and only work if I export all of them with blender.
Skeleton seems to having problems with naming and the end bones are distorted.
And every animation I import has a ridiculous number of keyframes, from an animation with 3 it went to 4485 for no apparent reason, this seems to be based on the lenght of the animation more than anything.