So if I enter a remote server in settings which only has space for one more harvester, then I change wallets and change the remote server in settings to another one that has space for one more harvester, will the first wallet still be delegating to the original remote server? I'm not sure this works because when I switch back to the fist wallet it does not say it is harvesting, it says start delegated harvesting.
If you start delegated harvesting on remote NIS A for account A, then go to remote NIS B and start delegated harvesting for account B -> both accounts will harvest on the 2 different remote NIS.
If you connect to remote NIS A and switch to account A in your wallet, you should see that delegated harveting is running. It could take a few seconds until it updates the button though.
You can even log out your wallet, shutdown NCC or your computer. The remote NIS A and B will continue to harvest for your accounts.