Herbie Questions

[Madreefer]

So I was under the impression that once you set your Herbie drains up there is no need to touch it. I'm constantly adjusting mine and it's quite frustrating. This setup has been up for 2 years and I've had to adjust from day one. Sump is in the basement and return pump is a Reeflo Barracuda which I have dialled back. Returns are 1" and the 2 drains and 2 emergency drains are both 1 1/2".
I don't have the drains submerged in the sump water. I've tried them submerged and above the waterline in the sump and it doesn't seem to matter as I still have to watch the level in my overflow in my tank. It either rises or drops in the overflow? Any ideas on what the issue could be? I have to adjust weekly.