With most anemones, once they find a happy spot they stop moving and settle in (bubbletips and the like), as long as their needs are met. I've never had a haitian, but per liveaquaria:
"The Haitian Reef Anemone moves around the tank and has a sting that can inflict grave damage to other anemones and corals."
So it already sounds like they tend to be pretty walky - what kind of lighting do you have? Anemone's require intense lighting - if its not getting the right amount of light that could most certainly impact its coloration (and also explain why it will not stop moving at all)
Also, have you been feeding the thing?
"The diet should include feedings of fish, mussels, shrimp, or other foods of this type."
They are extremely cool, and I hate to tell you to get rid of your new pet, but it's definitely not a good one for a reef tank
Saltwater Aquarium Invertebrates for Marine Reef Aquariums: Haitian Reef Anemone