State Farm accidentally paid me RCV instead of ACV. Questions on proof

So had hail damage. They estimated it out and sent the ACV check of 10.5k They had the shingle age listed as 20 year old, but were only 9, so I had it adjusted and they sent a 2nd check for 11.5k Then noticed they forgot 2 of the sheds. They adjusted and sent a 3rd check for 500. These 3 totaled 22k for the ACV of the 34k estimate RCV. A couple of months go by as I had to get the 3 checks, and mail them to my mortgage company to sign off and send back. Just recently Statefarm sent another check for almost 12k. The total works out to the RCV-Deductible.

My questions are: How do I need to show proof of repair? Seeing as I have the full amount and wont have to submit for the rest of the RCV.

Has anyone had their insurance company do this? I noticed on the most recent estimate, ACV has been completely removed including the amounts they sent, and only shows RCV now.

I do have a RCV plan but they were only supposed to pay ACV till repairs are done. Anything else I should be aware of or alert to?

Thanks