Apparently this is why cats are detecting the phos binders mixed into the food
I found out some interesting information why cats refuse to eat the Phos Binders mixed in with the wet food, and I'm sure it's been discussed here numerous times before.
The reason the cats are detecting the Epakitin mixed in with the food is because they're actually detecting (smelling) the plastic bottle odor, and the two combined scents of the powder and plastic create an odor that the cat is detecting. If you remove the powder from the plastic bottle and let it air out for a few hours before adding it to the wet food, it should fix the problem. There is more information about it on Google.
Hope this information helps someone.