It sounds like you have not completed the
shock process. The shock process is not complete until all of these criteria have been met.
Shocking:
Measure the FC level
Add enough chlorine to bring FC up to shock level (or a little higher)
Repeat steps 1 and 2 as frequently as practical, but not more than once per hour, and not less than twice a day, until:
CC is 0.5 or lower;
An overnight FC loss test shows a loss of 1.0 ppm or less;
And the water is clear.
Brush the entire pool once a day
Backwash or clean the filter as needed
Until all the criteria have been met you need to keep the pool at shock level. From your last few posts it doesn't look like you have been at shock level.
You also may want to pull out your ladder or steps and scrub them down with a bleach/water solution. Algae can hide in nooks and crannies where water does not circulate well and prolong the shock process.