Hello,
I am not sure why you are asking such questions. You already know you are not at risk so why bother asking?
IT doesnt matter how many different IP's log into a account at a site. You could be using a different computer. You could be at a firends house. You could have had your IP updated by your ISP. There are a million and one answers to why there can be multiple IP's for a single account. I know that i have at least 75-100 different IP's for this site alone. Cause i have used my IP, sisters, grandparents, not to mention the move i just had which changed my IP.
Plus if you did it legally you paid for the account how do they know if you shared it? They cant do anything i you did. It is a bought and paid for account and password. So there is nothign they can do unless they can first prove to a judge that the info was stolen to get a warrant for the surender of your address from teh IP address from your ISP.
Basically they wouldnt bother. They get hit with a million or more IP's every day. Why would they care about 1.
Cheers,
Mak