I wouldn't worry too much about those phosphate levels for your zoas.
What are you using for alk buffer?
You might try using a glue specifically made for gluing corals. They tend to have lower curing temps which makes corals happy.
Has anything changed in the tank?
using Reef Fusion 2 daily for the buffer.
This tank is very new, less than a month old, but most of the corals have been transferred from a friends tank while I set up this tank and sold my old one. So they were in a completly different tank for the last 4-5months.
Good idea on the glue! Just sucks cuz it's so expensive but oh well :/