Yea if it's doing it every day that's not normal.. Your test results don't sound good but I'm not very experienced to know exactly how they will affect the anemone. It would help everyone to know 1: how long your tank has been running. 2: what other inhabitants are in the tank. 3: when the last time you did a water change and what type of water you're using;Tap,RO
Water quality as well as proper lighting is crucial to the health of an anemone. Hopefully someone more experienced here will give you more experienced input.
If the foot of the anemone is becoming detached from the rock, it is dying. If you even suspect that it is dying take it out ASAP as carefully as you can because it will kill your tank very quickly, and any small pieces left in will also cause you a huge headache. After a nem dies, a 50% water change is something you want to do immediately. Then, keep a close eye on nitrates and keep doing water changes daily until they are 0. Honestly, there should be no ammonia, nitrates or phosphates right now but low levels are ok. I would do a 20% water change now to try to get those levels down. In my experience ammonia is present either because a new fish was recently added, something recently died, or your tank isn't cycled. I change 5 gallons of my total 29 once a week and my levels are always 0. If I miss a week they MAY be very minute, but the rufugium helps with that. If you don't have macro algae to absorb the nitrates and phosphates they will just keep accumulating.
Phosphates and nitrates always accumulate for various reason and again, the presence of those two are normal but bad when reaching high levels. I'm just giving you everything I know because I don't know how much you know.
Is the tank cycled?