When moving settings from my old server hosted elsewhere to my plesk box here at RS my sysadmin has copied the old plesk key file onto my new server.

It all still works but is this going to cause problems at some point?

I think it will since you should be using the license you ha on the old server. You might want to ask Rackshack to copy over the key file again.

Shouldn't be a problem since they have forgottren to copy the license key over to all the servers I have ordered until now. For each server I had to ask them to copy it over...