May I get your units Model number to better assist you?
if you open the door the tag will be on the face frame.
ok good !
So everything seem solid and the lower rack is no bent or anything ,,HUMM!!!
Did this just start happening?
YOu got that right!!
And the lower rack seems to be setting down on the side tracks ok ?
Yes !! and see if it makes a difference .
Some one might have sent you the wrong rollers.
yes if you remove the nut the arm will lift right off .
No problem .
I was glad to assist you .
And Happy New Year also .
And thank you in advance.