Please, never say this. Always quote exact version numbers.
You are using "fast user switching", right? The second user DOES get AnyDVD functionality, but he must live with the settings user one has chosen. AnyDVD is still doing its job, but it is invisible. To change settings, you must switch over to the first user. Or the first user must log off (and therefore end his AnyDVD session), so the second user can start his own AnyDVD.
I burn many discs in a row with CloneDVD, no problem for me. Sorry, but this didn't help you, but just to note, that this is no general problem.