Boy that's ridiculous. If I were you, I'd trade my house and pool even for one in say, middle Tennessee and let that poor sap deal with it......
Interesting enough, I have raised my CYA to 50 as well and have noticed identical FC loss as you, about 2 ppm a day on a cloudless day. This surprises me as I thought the UV degradation would be slightly higher at the lower latitude. Let us know how 60 works for you.