the 'remember me' part could be related to your browser itself, not the site. if you clear cookies and temporary internet files after you close your browser, your action of clicking the 'remember me' box will be erased.
actually, i think i used to have the same problem with the 'invalid user name' showing up too. iirc, a mod or an admin had to fix this; every once in a while this site seems to have 'issues'
and for the password e-mail, i don't know if the reply is, again, sent by a mod or an admin, or if it's automated... sorry i can't help with this question
