Technical problem

I know the owners of the forum in question have been in touch but im trying to sort out the problem myself too. I posted on a thread a few nights ago which apparently came up as another users (admin) account. I do not have access to the account in question and have never logged into it. The investigations apparently have found my IP address logged into that account but as i have said I have never logged into that account so can not understand how this can be the case. Is there any technical explanation at all as to how this has happened?

https://help.forumotion.com/t112671-still-issues-hacking-a-possible-glitch
https://help.forumotion.com/t112638-user-hacking-an-admin-account
Are you talking about these?