Your numbers are OK, but actually you probably should be running your chlorine more like 3-6. See the chart at the following link. Higher temps don't really change the testing readings you are looking for. Should still be the same. Also, I'd ask him specifically what he is putting in your pool, though. Not just 'pool sticks' but ingredients. He ought to be able to give you an estimate on your volume.
http://www.poolforum.com/pf2/showthread.php?t=365
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