Ah ha! I have the answer.
Some idiot set up the America Pawn Stars series using the Year aired instead of the Season number.
So you need to change the search criteria when you look up Pawn Stars to the appropriate year, as per the image attached. That will get you the correct information.
You could just change the Season tag in MC for Season 1 to 2009, 2 to 2010, and so on, or you could just change the search criteria when you do the lookup itself, and leave the Season number as 1, 2, 3, 4, etc.
If you just change the search criteria, you will need to do the lookup one episode at a time.
If you change the Season tag for all Season 1 episodes to 2009, you could look up the whole season at once. This probably the easiest and best solution, as it will work for all lookups.
Unfortunately if your EPG data has Season numbers instead of years, then the automatic lookup done when the program is recorded and imported won't work. You will have to intervene using one of the above methods. Again, probably just changing the Season number to the Season year would be easiest.
See how you go with that information.