Chances are, your pH value is reading high (false high) because your FC is at 10ppm. That's close to the upper limit of the pH reagents allowable range since high chlorine levels chemically change the pH indicator color.
So, take it slow and easy dropping that pH. With 8 drops of acid demand reagent, your pH was likely A LOT higher than 8 but there no way to know for sure. You're going to need to add the acid slowly and in stages, allowing at least 30min with the pump running for good mixing (you can give it some help too by brushing or skimming the pool). Measure after each stage and add more as needed.
As you drop your pH, that TA will come down as well. You might want to retest TA after you get your pH lowered to the desired value.
Second step is to get your FC/CC right. If you do need to do a SLAM, you'll need to make sure your pH is ~7.2 to start because pH tests are not accurate during a SLAM.