When I can't find that site in the list, even tho if I try to add it, I'm told it's already there.
I accidently added the wrong site to my restricted sites list and want to delete it as I can't login to that site now. To do this I have to highlight the site then press remove, but I can't find the site in the list anywhere. If I try to add it to the trusted sites, I'm told it has to be of the https format. If I add it as that, it still doesn't let me login.
How many entries in your restricted list at the moment? If you have Spywareblaster and/or Spybot installed and immunization switched on the lists will be huge. Temporarily disable them and then look at the restricted sites list.