Pulsing seems to come and go, especialy when you first get them. Mine pulse like crazy now.. but it took about 3 or 4 months for them to start.
Its said in some places that the pulse to try and get more nutirents from the water... so... maybe your tank is just really full of nutritents..
I'm sure there are some other opinions out there.. but I wouldn't worry just yet if everything tests out ok and your other corals are doing fine.