You need to post all your levels.

It sounds like you either have no CYA or too much CYA.

Sunshine breaks down chlorine rapidly, without CYA.

Since you have algae, your strategy is wrong. You need to shock your pool and keep it shocked until the algae is gone. Read up on it on the various forums here. But you need to shock your pool 2 to 3x a day, testing your water constantly to keep it there until the algae is all dead, and stays dead.

Until then, any living algae will absorb your chlorine.