However, since moving to Haystak, and keeping the budget the same, our Paid and Organic Traffic had dropped off significantly.
Hey Kyle, Haystak uses a reverse proxy to track clicks, calls, and forms on your website. Usually they'll use *.calls.net in the PPC ad urls, looks like they have with your site too:
http://billestes.calls.net/ That's the reason you are seeing differences in your reporting vs. theirs.
Personally, I'm not a fan of reverse proxy tracking, and I don't need the conversion justification to know it's if it's working or not, I use other methods. You could ask your rep to remove that, then your traffic will line up, but I doubt you are losing or missing traffic if all things are the same. If you are relying on Cobalt CDK reporting though, it won't line up regardless. There is too much bloated traffic with their analytics in my opinion.
Also being GM stores, do you have multiple websites which you are also pushing traffic to with PPC? If so, I would use just one site. Another possible reason might be under spending, over targeting. Possibly by spreading out your focus on too many strategies, like dynamic used inventory ads, new inventory ads set in a too large an area, broad premium display ads, etc. I noticed you're outside of Indy, I would focus your PPC money on 20 miles around your dealership first, it looks like you are spread thin compared to the competition.
I have a few dealers I run PPC for in-house, I also use Haystak and Dealer.com for some, both are excellent in my opinion.