Well, to assist us, I reinstall Sony Vegas Pro 13 Build 545. I can not repro your issue. Color Corrector both tabs are working as expected. I can not repro your issue. Color Corrector, both tabs are working as expected. What Build are you on?
So, I’m concluding you have a Local Issue. Maybe you should check on your Account for the last Build? Maybe do a Factory Reset. Also, do check you’re up to date with your .Net Framework.
OK, to reassure you, I can’t see a way to remove this error through a VP setting.
Cheers – G