New client

Since you all know a new league client is being released and has a major option of staying logged in, Today after restarting my pc for a windows update i opened the client and it will usually log in automatically but for some reason it told me my password/id is incorrect so i hopped into the website and saw my credentials are in fact correct but i still changed the password/email for the fear of being hacked but i couldn't even type the new password again since the new client automatically closes after telling you your password is incorrect so i reinstalled league (clean reinstall) and the old client showed up and i tried it again just to get my client updated and the problem still occurring, I tried different computers and none worked but when i tried my other account it worked fine.

Does anybody know what is going wrong and how to get my account fixed

-Thanks in advance