Hopefully the guy at the lfs didn't press against the septa too hard and puncture the tissue. If this happens again, tell them to let the coral retract as it wants to and get a larger bag if need be. He is probably trying to "prepare" it for the ride home, but the coral will do this on its own. Human interference will only add to the amount of stress.
On the bright side, it sounds like you have had the coral for less than 24 hours. It is still acclimating to your system. I wouldn't worry about it, yet. If your system is in good shape, there really isn't much you can do besides offer it some food once the lights have turned off and see if it produces a feeding response. This response will appear as a row of clear tentacles forming a ring around the inside of the coral. Any meaty food will do; mysis, cyclop-eeze, etc. It is best to offer it these foods at night to replicate its natural feeding response from nocturnal microcrustacean activity.
Other than that these guys will do well in a stable are with low flow and medium light. The sandbed is often found to be an ideal location for this environment.
Good luck and keep us updated :thumbsup: