Thanks to Elder Dragon on Corvette Forum for spotting this issue. The Custom Search tool was saying there are 337 Z07 equipped cars, while the Z06 Dashboard was saying 340. After digging into it a bit I found that when I updated the Dashboards database queries to only include US market cars, I missed this one. So the 340 was including 3 Canadian market cars. The issue has been revolved and the Z06 Dashboard now shows the correct number of 337 Z07's for the US market.
Just figured I should explain this as someone would probably notice 3 Z07's vaporizing from the count on the dashboard.
Update.. found the Monthly Stingray query on the Stingray Dashboard also wasn't sticking to the US market. Fixed that one as well. I double checked every query in the dashboards, and they are all good to go and only pulling data for the US market. The two that I fixed today were the only ones with the mistake in them.