I'm going to retest everything today when i get home but I'm also going to take a sample to Leslie's just to see if something went bad or something I did on my part.
the spa is 8wx8lx3-5Deep, pool 40lx18w(but tapers to 10ft),3-6deep
Looking at your pool pic I see a swim lane and some steps. How long is the swim lane 40 feet? How wide is the swim lane from the edge of the steps to the lane wall in feet 10? The depth of the swim lane from 3 to 6 feet? If so then your swim lane is approximately 13,500 gallons.
Your spa is 1900 gallons using your numbers. That rounds up to 15,500 gallons not adding the area around and in front of the steps. Where are the other 14,000 gallons? Perhaps your picture shows only slightly more than half of your pool volume?