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Judy:
Not to worry, the numbers look good. pH of 7.2 is a little low, but you can swim and you don't need to do anything. With your CYA, when FC drops below 10ppm you can swim. At that time, the splashing kids will aerate your water, and your pH will rise again (No, really! Check the Alkalinity forum). AT WORST you are shocking your pool.
Carl
With the algae problem - you should hold your chlorine level at 15ppm until the algae dies. Run the pump 24/7 to filter out the dead algae. Also there is a bleach calculator that you can use to figure out the amount of each chemical required to get to the readings you want.
BTW - when adjusting PH a lot of people here add about 1/2 of what is required - then test 24 hours later and then adjust again. The 7.2 isn't that bad.
Judy
your original post said your TC was 2.0 and FC was 2.0 and that would mean your CC was 0. My first reaction was going to be "why do you want to shock?"
If the water was clear and CC=0 then there is no reason to shock. Then much later I see the you mention mustard algae. That changes things.
Maybe someone with more experience can help both of us here but I would have thought your CC would have been up some if you have mustard algae. OR does mustard algae not yield measurable amounts of CC? So was the test not good or the mustard doesn't cause CC to rise?