try and lower your salinity a little. Just scoop out a cup of water a day from the tank and let the ATO top if off, until you bring it down to 1.025-1.026. That will also help bring down your alk and calcium closer to the typical range. It will take several days, which is what you want.
With no ammonia, and the presence of nitrate, the nitrite test is suspicious. Probably another bad test. You can just stop testing that altogether. All you need to know is if there's nitrAte, then the nitrite is being consumed.
Phoshate could be lower, but I'd still suggest leaving the tank alone for another week or two unless you start to see a huge algae outbreak. A bit of GFO for a day or two will help if you need it, but if the tank is happy there's no need to obsess about a specific number.
Go easy on the feeding. If the anemone is inflated and not moving, it's sufficiently happy.