I'm assuming (correct me if I'm wrong) that you've been using dichlor or trichlor as your chlorine source prior to switching to bleach? (That assumption comes from the now-rising pH and the high CYA since your switch to bleach). If that's the case, the pH is rising because the bleach is not as acidic as the trichlor/dichlor is. Those chems tend to drive and hold the pH down. Since a switch to bleach, you're not adding all that acid, so it's not surprising that it's creeping up. Also, aeration tends to raise pH, so splashing kids, driving rainstorms that splash, etc will drive the pH up a little. You can leave the pH where it is for now, but if it rises any more, just use some of your MA to bring it back down (please read the link in my sig regarding safe use of MA first, though!). There is no reason to raise the TA in your pool (I'm also assuming you meant 80, instead of 8?) unless the pH keeps swinging and you can't control it.

So,...adjust the pH first (it might drop the TA a little, but that's okay). Then keep an eye on it for several days, and if you find that it's not staying stable, THEN you can increase your TA a bit.