I've spent a lot of time trying to make my folders not read only too. Even talked to my computer support staff and they were unable to resolve it. Guess what! There wasn't anything to fix.
Did Google search and found out that while files restrict changes when it's read only, folders that are read only are read only so different programs know how to treat them (it's a bit technical for me to explain more, since that's all I understand). Kyle's answer has the more technical details about it all.
But the real eye opener was this website which had pictures. Seems that even though the read only box has a little square in it - it isn't read only. Just when the box has a check mark in it, is it read only. So all this time and energy and they weren't even read only and even if they were, it's only important to the programs to know.
Hope this is the case with you and they aren't read only, so you won't have to worry. Cheers! Here's the pictures telling which are and aren't read only.