I had great difficulty getting an account setup -- on the first attempt the site did not like my email address. So tried again with a different address and it worked. Added project successfully to one computer. Tried to add project on a different computer using BOINC manager, choosing the "have account" option -- failed! Then selected "new user" and entered the user name and password that I successfully used to set up and account in the first place -- succeeded and project was added. However, only one of the computers shows up in my account. Which computer depends on which one I used to connect to the account!! So there appears to be two accounts with identical usernames and passwords!?!??!

UPDATE: Now my account only shows the first computer that I connected, regardless of which machine I use to connect to the account. So, where is the second computer? It is crunching on a work unit, but I cannot see it in my account. . .

Update2: I added a third computer and now my account shows that I have two computers. Guess the second one got lost in cyberspace someplace... Perhaps I should remove the project from it and try adding it again??

No responses, but I solved the problem (more-or-less) by adding the machine manually using the account. Still have an additional account that I cannot access floating around in the system someplace. . .