Do you set the user ID on the shortcut used for starting Adagio? Edit the shortcut properties (right-click on the shortcut and pick properties), and on the Target, look for a parameter such as /uSYS after the program name. Remove it (or change it to the user ID you want).

The 'Remember User' checkbox on the login screen links your Windows login to the Adagio login. Perhaps try disabling this checkbox the next time you use Adagio, and then the time after that the setting may get reset. Then you can use the other user ID.

Please let us know if removing Implied Decimals has an affect on the issues you reported (other than the check number scenario, which we were aware of).