Hi, new here and i need your help.

I'v got an civic eg6 with abs.

I replaced all around brake front system. Brake master cylinder, hoses, caliper sealing, pins, caliper piston , rotor and pads.
Unfortunately right caliper gets hot when i'm driving. Left caliper is ok.
When i'm braking the car goes sideway-to the right.
When i chceck the caliper it seems the right caliper piston goes (returns) less (backwards) from pads while i'mbraking than left caliper.
The left caliper piston goes (return) nicely "far" from pads.

What could be wrong ? Old bad abs module ? Old bad steel pipnig ??

Thank you guys