well ok, back to my OP, it never was a breaker issue! to begine with! just a recept issue... i guess i could have tried a breaker but just assumed it would trip if the recept did so i didn't even want to go there, given the cost of a breaker vs outlets, it wouldn't have been more than $20 to just throw recepts at it.
i replaced the tripping outlet (in first location of the circuit) with a new afci outlet, it protects only one other outlet on the circuit, which is behind the owners bed so i didn't want to move it. the next outlet down the line also afci and only protects one other outlet, in a closet on the opposite side of the wall. the rest of the circuit, the closets light and switch, which continues on to the laundry room, then out to the garage lights that were just installed with commercial instant start ballasts and lamped with l.e.d. 4 footers that can be used with or without removing the ballasts (they were not removed).... are NOT protected by the last afci recept. Eaton afci recepts were used in all cases. I havent seen anything about whether or not afci recepts have any unknown gfi circuits, but i will assume not, and probably get another 14 pages on afci recepts, but hey lets set a record. i will read until the thread dies!
and for the record, i swapped these afci recepts in about two weeks ago, and i have NOT heard back any news about them tripping, which i know i would have for sure because this owner is focused on this issue, so again, i am going to assume here, that the problem has been solved. my personal belief, is that the tripping was being caused somehow, i don't know how, but somehow by the l.e.d. lamps/ballasts combo or just the lamps somehow, but for all i know there could be some kind of valid afci issue in the houses wiring in the laundry (fart fan) or garage switch leg. Hope not, but i have fulfilled the n.e.c.'s requirement of protecting all RnR'd outlets, (except for the closet light in the bedroom), so I am walking away from this job....i HOPE!