If you are holding any claims, get on MLRS and check the status.
Two of my claims that happen to be listed in the guide have been listed as closed for non payment off maintenance fees.
The small miner waiver was sent in July and recieved (certified return receipt).
From what I can find out, some waivers were incorrectly entered in the system, and then MLRS automatically listed as closed. BLM says they caught most of them, but some have apparently slipped through.
The issue is going to be overfiles due to BLM error, and they're won't do anything after that, then you have to go to court to get it sorted out.

Contact your state office with the claims involved and the problem, they have to manually correct.