I've tailed the log; no domains popup when that error appears. My last test is to have a blank blocklist and see if it happens. That'll kind of narrow it down absolutely.
I ran privoxy at home for about 1 month to test it out. Realizing that it was only http requests, I figured it would be useless. Turned out to be wrong; almost 80% of 'blocked' domains were still http requests. I found that only 1 in 5 ads were served over https. That was with approx a month's worth of data points.
I ordered a new USB drive because the one I have is shot; I am going to setup everything from scratch and give pixelserv-tls a try again (probably this weekend). Will share my findings...
Thanks for being so responsive and helpful
@thelonelycoder