Looks like you are testing with strips. It's very hard to get a read on what is happening.
You need to get a good test kit--preferably one with the FAS-DPD test for chlorine. Ben's PS-234 is the best, but you can also get the Taylor 2006 kit or online from Leslies the Chlorine FAS-DPD Service Kit.
In the meantime, get to a pool store and have them test the water for you and post the results.
Test strips are notorious difficult to get a good reading from, especially for anything but free chlorine.
CC IS chlorine. It's the part that smells like chlorine. My pool can have VERY high clorine levels and smell like nothing. You may have a faint chlorine smell when you leave a pool but that's because your body has things that have been metabolized--leaving CC on your skin. If you are in the water long enough they vanish too.
I would normally think a blue cloud is one thing, but the chlorine smell and the patch growing makes it sound like an algae bloom barely in check.
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