EC and CF are going to be exactly the same every time. your PPM is just a conversion. Stick to the millisemiens/cm^3 or whatever it is, lol.. or CF.. the ppm is not apples to apples and different equipment will convert it using different scales.. purely a choice of the manufacturer.
https://www.perfectgrower.com/knowledge/knowledge-base/ec-to-ppm-conversion-chart/
You can see in this table that "PPM" from a TDS pen is actually measuring EC, then converting... and whimsically converting using any of the three scales. That tells you the accuracy of such a conversion is quite inaccurate if any of 3 scales could be used. It's a guesstimate based on electrical conductivity and not all moleucules behave the same way in this regard.
you can remove 2 of those 3 tiles as they are redundant as far as the data you gather.
soilless, you are probably going to cause something to build up at 2+ EC. Though calculating ppm from your guaranteed analysis labels will give a more precise/accurate PPM value. there are online fertilizer ppm calculators and apps that can do this for you. It may not be as high as 1100 PPM due to conversion factor used by that device not being good for context. Just realized your tds pen is also including any PPM from your tap, so it isn't as high as i perceive it to be. I feed at 650-700ppm (calculated, not a tds pen) but my water is hard and i'm probably up near 900-1000 too.. the key is knowing, tracking and adjusting the nutrient portion over time relative to observations.
sometimes we don't see ramifications of what we do for weeks or even 2 months, and specifically, Mg, is impossible to see a deficiency symptom for 30+ days after the inception of the Mg deficiency. Honing your formula requires a long memory - take notes. be consistent. you only need very slight changes in flower phase. Again, if you consitently see issue creep in during flower, excluding senescence, it's the formula's fault and not the plant's fault.
Everythign loooks healthy now, but that's easy to do even when feeding slightly too much at this stage. You'll find out soon enough.
This is 10% mad scientis, and 90% not doing too much and stepping on our own feet. Avoid the gimmicks. Form a simple baseline for results, then try new things.. easier to distinguish smoke from reality, and significantly harder to do so if you don't