There are a couple of things going wrong with that show First TheTVDB.com knows it with only one dash "Rough Cut - Woodworking with Tommy Mac" I will likely make a rule to try with single and double dashes. Why EPG does show two as well.
A bigger problem is because this is an older show there is nothing to map to in the TheTVDB.com data base
Here the subtitle doesn't match exactly, there is no zap2it ID, and the first aired hasn't been filled out. TheTVDB.org is a community project and when the data isn't there, there isn't much that can be done.
<Overview>Tommy is the first to say, finishes are an art unto themselves. That’s why he dedicated an entire episode to this topic featuring two very talented finishers, Christine Thomson, a period finisher from Salem, Massachusetts, and Mark Libby, a local finisher who has worked with Tommy for years. In this episode, Tommy provides detailed project instruction for work requiring a finishing technique. He visits Christine’s shop to see some of her techniques, and later, Mark Libby swings by Tommy’s shop.</Overview>
I'd be happy to look at other problems though. The matching rules can always be improved.