There's no wrong CPID. This code is generated at each project and is unique. What happens is, that eventually the oldest ever generated against one and the same email address will be used at all projects, but this takes time... 24-48 hours. Important in 'aligning' to the oldest CPID is, that one of your clients has to have all your projects attached [can be active and suspended]. It will than figure out over time which one to use for all projects. If in a hurry, hit the update button on the projects tab of BOINC Manager several times selecting each one by one, active or suspended.