Really appreciate you clarifying these questions for me. So far the RPi is running fine, I don't stake the same wallet.dat on separate devices simultaneously, I was just mining on the Desktop GUI Wallet on my PC while I was fixing the issue, other than that I just open the GUI when I want to check the balance.
Hopefully not, but otherwise I know what to do now!! The "peers.dat" file is always there even after deleting and rebooting, but must have been empty file, hopefully now its not any more.
Yes I noticed the debug file on the recently working RPi and it had all the same messaged which made me think it was normal! But clarification is always good. When I get a bit more spare time I will check out your blog and try to understand some more.
Once again, Thank you very much