You may want to adjust the proportional. Check the manual on how to do that. The tail should not spin around if your not even off the ground.

One thing to note on the BCP, once you get off the ground in a hover the tail trim will probably change so once you get good at hovering trim the tail to center while hovering. Also, on mine, the tail will stay steady at hover but as I give more pitch it swings to the left so you may have to fly the tail quite often.