Ideally you do want the pH adjusted to about 7.5-7.8 at closing. Remember too that when you dose your pool with more chlorine (FC over 10) you will get a false (high) pH reading, perhaps that's throwing-off your test result a bit? pH can rise slightly in the winter months. Higher pH could lead to scaling, although that shouldn't be a big issue for your type pool, but still not ideal. The fact that your TA is still at 120 could also be pulling your pH up with it which indicates you could still lower the TA some more. Since your water temp is still over 60, I wouldn't close the pool until you know for sure the water will remain below 60. So you may still have a few days where you can adjust the TA and pH down to remain more constant. In the end, just make sure the FC is below 10 when you test the pH. Next spring you'll test all your chemical levels and start fresh next season. Hope this helps.