Since NAV inception, when a check needed to be re-printed, the user would VOID the check record in the payment Journal and then print the check again.
In recent versions, the functionality to "Re-Print" the check is available.

In both cases, the Check Number will auto increment. What is the purpose of one function over the other? My suggestion is that the Reprint function should NOT increase the Check No.

The void and print should increment the no.