You are creating multiple NFTs when plotting instead of creating your new plots to the same NFT. This WILL break your farming system if you keep doing it. If they have not changed the code, any NFTs over 20 are not processed.
I found the answer on September 21st so the answers are contained from message 17 on in the above thread.
You may need to identify and delete all the plots created to the extra NFTs and you definitely need to stop creating new NFTs. You can manually delete all reference to the extra NFTs in your config.yaml. You should have one original wallet and only one NFT wallet in config.yaml when you are done.