I cannot sign out of AB, which means that my daughter with her user name can't sign in. I know that all my posts are more exciting than hers, but she'd like to be able to sign in:
Well she was banned (by me) a couple of years ago when she crept in on my username and posted silly q's (yes it really was her). I've turned computer off but makes no difference.
For the serious answer:
Right click on "Internet explorer" and select "delete cookies".
If you use netsacape or firefox or somthing similar, the options are slightly different but your clever*, you'll figure it out.
*Not to sure on that statement!!!
I have had the same problem, except that my daughter wasn' t posting questions. Do not know if this helps but I had to put in an additional email address so that the two of us can use the site. It seemed it didn't like the same address but once I gave it a second one it was fine.
Just have to remember who was last on the site before you answer or it can look a bit odd in the same post.