A slight concern about Pidgin

So... after a while of not using Pidgin, apparently it had certificate issues with AIM. I deleted the old version of Pidgin from the computer and installed the new version. Something odd though... it remembered my login name on AIM. Why'd it do this? Please respond ASAP. A baffled

A slight concern(sending again because unsure if received)

  So... I uninstalled the old Pidgin because of a certificate issue with AIM. Then, I installed a newer version of Pidgin and strangely enough, it remembered my AIM name. Is this normal? I completely uninstalled the old version from the computer and then installed the newer version and it