RE: Plane climbs after trim........
It is not at all unusual to change engine thrust (both down and right) many times during the first few months of operation. Some changes will be to suit your own flying style that will be evolving. Some changes will be to accommodate the invariable minor differences that creep in during assembly. And yes every bump up repair will introduce more changes to CG and control throws and alignments.
Hopefully the airplane will zero in exactly to your liking before the expiration date.