Feeling so dumb... I have replaced my upper control arms and axle bushings and, for some reason I don't know, may be the planets lined up in a scecific way, I have installed the axle bushing on the driver's side the other way round. Fron inside the axle.

On the picture below you can see the way it was installed previously, with the lip facing outside. Mine is facing with the lip inward.



Do I need to worry about that and do I need to install the bushing the correct way?

Good question, I'm curious now also. #howwelearn

IIRC, the bushings are simply a press fit in the axle sleeve with no taper, so it should be a non issue.

My point is that the bushing is not symmetric. The part with the lip sticking from the axle seems the be longer than the other one. But are 5mm important for 15+ y.o. jeep?

You're talking about 3/16"...shouldn't be an issue as long as there is clearance between the arm and the metal ridge. A 3/16" offset in a 16"+/- CA is negligible.