(1) Some gyms will always be training L4 while competing L3 with those girls. THEY WANT THE WIN BAD so they make them have all their skills BEFORE entering that level. Consider it what you will. A win in compulsory levels plus 25 cents will buy the gymnast a gumball and a nice steak dinner, but the gym can see it as a marketing benefit and an advertisement for their rec and competitive programs.
(2) They can kip now in L3. I think encouraging the gyms to start kip training in L3 before it is required will help with this issue of the kip gateway to progress. Good.
(3) At some point you have to stop being concerned about repeating levels. Now L4 does not really seem the place to do it, but if you are going to have a happy relationship with the gym overall, and they repeat her in new-L3, just suck that up and the chances are that because of the repeat, there is some level she WON'T repeat later.
We are sort of in the same situation. DS is hopeful he won't be repeating but has been warned it is possible. Due to some severe coaching issues, some of his skills will require remediation.