I just recently updated my copy of lfs, although.
As ive been racing lately, ive been loosing my setups?
Yesterday i Had, 15 setups, now today i have. 5?
Whats wrong with this patch , or is it just my copy?
Also, ive been loosing some skins too, maybe someone should check this out and try to fix it??

It's working perfectly fine for everyone else.

What version of LFS did you have before the update?
Some previous versions had incompatible setup files. This was a fairly long time ago though.

Are the "missing" setup files still in LFS\data\settings?
If not you either deleted the entire LFS directory, or deleted them manually.

Do you still have the "missing" skins in LFS\data\skins?
See answer above.

What comes to mind that he had one car selected and he had all those setups and skins, then at some point he has tested other car and for that he does not have so many setups or skins?

Also very possible