anemone gone wild


I had purchased a bubble tip anemone from here. It had been healthy and looked good. My problem that i had with it was that it would not attach and stay in one spot. At night it would stretch out and try and touch other corals (ones that were probably 6 inches away!!) It moved around so much that it ended getting sucked up into one of my pumps and dying. I was hoping to keep an anemone for my clown.
Is this just a rare occurance or is this the typical behavior of an anemone?
Are there other anemone's that are not as aggressive?
I'm not sure what i did wrong.