The factory pillars are pressed in. I have had the same thing. I also had one that was pressed in too tight and it wasnt all the way in, and when they tightened down the action it forced it the rest of the way and split the laminate so i had to get it repaired.

I would either replace them with aluminum pillars or atleast relieve some wood around them a little so that bedding compound will get down beside it to hold it tight.