Local clubs absolutely do count for the PAX calculation. The person that runs the PAX index says he looks at over 1300 local events every year, and the fact your are published on the internet likely means they are included.
However, PAX is per-event, not per season. It doesn't consider championships at all. Also, PAX looks at relative times, not relative standings. If second place is 0.107 behind first means something quite different than if they are 3.786 behind.
Here's how it works. Let's look at your first event:
AXWare Systems (AXWARE_TS) - Autocrossing and Time-trial Solutions. Licensed to:Central Florida Region SCCA
autocross.cfrscca.org
Fastest PAX of the day was 28.757 in an FS car.
95% percent PAX time of this would be 30.195 seconds. Any car slower than this is thrown out, as it's considered to not have a top tier driver. In your case, this means only the top 18 drivers are considered.
Now only class winners are considered. So only the leaders of FS, HS, CS, ES, STU, CAM-C, AS, EV are included in your group. Only 8 drivers.
Now, the median of those 8 drivers is identified. I didn't do the math here, but let's say 29.5 seconds.
Now, for every class faster than 29.5 (FS, HS, CS, ES, STU), the PAX for those cars gets a +1 in the database. For the rest, a -1.
At the end of the year, they see for each class if it's positive or negative, and how positive or negative. They then adjust the PAX index based on that.
So for you, in the first event, your result would be a -1 for EV, slowing the PAX a bit. Looks like for #2 you were +1, 3 was a -1, 4 was a -1, 5 was a +1, 6 was a +1.
Overall, for your 6 results, your PAX is a +0. Per the method, this means the EV PAX is exactly right.
Given the dominance of FS and SS in your club, PAX says that FS's and SS's pax is way too low.