I could be about to split. I suppose it's possible it's deformed too. I have some xenia, and one of the polyps is deformed. The arm is normal, but the polyp on the end is extra large. The fingers on one side of it pulse together, and the fingers on the other side pulse together, but the two sides are independent of each other. Looks kind of like siamese twins. Then there's one extra long finger right in the middle that doesn't pulse at all, just sticks straight up. I'd say most likely your polyp is about to split, just thought i'd throw out my observation that corals can sometimes grow deformed too.
-Bob