I have expanded on the list of the Cup series wins that you were able to find on the stats & records page. I have given the list its own separate page expanded a bit. You can see how many wins were recorded in each season as well as the date of the last win. I also changed the tiebreaker ranking order just a bit. Instead of ranking teams whose win was most recent last, I changed it to rank them first.
When I update the stats & records page next week, I will remove the previous wins list and just put a link to the new page there. You can also link to the new page off the Cup series page, down at the bottom where I show the top 10 all-time winners.
Correct, wins are only posted on the team pages if it's with that team. Also, no wins for drivers prior to the 2008 season are posted on those pages since those teams did not even exist then.