Again my laymans ramblings.
1. You may have free/cheap legal resources but be sure the resource has sufficent expertise in areas you need.
2. I'm still hung up on if a Cira 2006 order which falls under prior rules does NOT meet the requirements of being signed by poster and have contents which meet the precise criteria necessary to meet IRC which sort of says have all the key words otherwise found on form 83323 then that part does NOT qualify on its face! And if Mom does NOT meet the 50% + tests found in IRC then she does not meet those parts either! Then she flunks it both ways! To me she has burden to cure it--why should you do her work for her?
Its not good guys that count--but rules, process, proceedure and attention to detail including law and case law, and lack of dirty hands.
True, judge could pound you in dirt for a frivilous excuse you seek to debate--but I think there is a true lack of clarity and or intrepretation your way--again depends on how your advocate presents it. Or judge could direct you to complete a 8832
3. Me, If I felt the correct position as carefully reviewed by counsel was A and the downsides to being wrong were rather limited--as in being required to back up and restart at A then I lean towards taking position A and forcing my opponent to argue otherwise --I'd not seek to ask permission to take A. But rediscuss with counsel. I suspect you have to be in willful violation of a clear court order before sitting in jail is a likely outcome--that fact that postion A v B is not clear sure seems short of same to me.
4. Me, if the facts of the situation were such that Mom was no longer primary and the new status quo was that I was primary I might assertively petition for a modification of the order to accurately reflect new in place for some time status quo. I think you may be better to force it at a time and context you chose than for her to advance an alternate view .
I might be able to bury a clarification issue under a different rock in same petition--I'll bet your counsel can do same only better .
5. Go back to #1---average professional gunslinger still beats laywoman with rubber knife (pro se) 99.5 times out of 100 at OK Coral
Even free counsel works a lot better if you pay them ! So don't wear out the welcome mat---put in some decent money ......