This is caused by an option in the System settings, causing the report to use the printer set on the template.
Note: This will affect all users, so only has to be done once.
To disable this follow the below:
Click the System tab
Click Options
Open System Control Options
Click the Documents tab
Click the blue arrow for Crystal Documents
Untick the check box at the bottom for Always use printer set on Crystal Report. Now print again, and the printer you choose will be the one used.