If you have have tried to reinstall steam because you were having problems and when you go into your steam name and you try and install CS / DOD / TF exe... its because u are only ment to make ONE acount steam on ONE computer with only ONE Cd-Key.  Who in there right mind would do that I mean I get the whole copyright thing but if you can only type in your CS CD-Key once then you shouldnt have trusted steam.  I have seen people on steams forums saing that they have been waiting for about 3 months for a reply to their email they sent about this same topic.  If steam could on the next update please put in something were you can delete some of your old acounts that would save alot of people from gaming hell.  For now if this has happend to you, like it has to me,  theres nothing u can do exept flood their email inbox with tons of emails so they will fix this thing.