My photoperiods have made progress since the start of the week (now on day 5 to week 3 on pic 1 and W4 on pic2) I’m currently running a water then feed

For autoflowers at this age, you're overfeeding - particularly the nitrogen... I'm not understanding why you think they're asking for more nutes if the ppm bounces from 435 to 575? If you're measuring the ppm in the soil, of course it's going to go up when you feed... but for this age, it should only be reading between 400 and 500 - anything over that is too much. Slow it down or you're going to run into a nitrogen toxicity and be getting a calcium deficiency as a result. You also want to keep your pH at 6.0 or above - don't let it drop below 6.0 because the nutrients won't be available to your plant at all... Good luck!