I have had 2 ports. Both of them moved pretty good for about 2 months after surgery. Its the scar tissue building up around it, it just takes time. They dug a whole to put the port and now the port just needs to settle and be accepted by your body. Personally I flush my own port and this time I was given a mini port and on more then one occision I have missed the darn thing so much that the neddle just went straight into my skin, little thing likes to move. I had my last one put in May this year and its geting better!