I see no point using the HTH test.
There are two chlorine tests in the TF100. I suggested you do both and compare to see if you can read the yellow one correctly These last results show a 1 ppm discrepancy. So keep practicing. And if you haven;t got it mastered in a week, just skip the OTO tests and rely on the FAS-DPD test results.
They CYA sounds about 25. If you added 9 ounces by weight, it should be about 40. So it's either not dissolved all the way, or you weighed wrong, or the pool is bigger than you think, or you did the test wrong. If it's still reading low in 3 days, add more to get it to 40.
How does the water look? The chemistry looks fine. Is it warm enough to swim yet?