I do not see description of Maximum Time and Minimum Time fields.
Also, are any of the time controls allowed to be negative? I would suggest the following:
Pace time and and pace moves should not be negative.
If spare time is negative, then your initial reserve time is negative (which requires you to accumulate more bonus/extra before you actually have any spare time), and the grace time must be set positive (otherwise you will lose immediately).
Grace time should not be negative.
If extra time is negative, then there is a time penalty after every move.
If bonus time is negative, then there is a penalty for moving too quickly.
I do not see description of Maximum Time and Minimum Time fields.
Also, are any of the time controls allowed to be negative? I would suggest the following: