Replying to Mounting issue...

So I was just mounting some bindings in to a new pair of skis, the shop drilled them and then I literally just glue and screw, I've done this on at least my last 10 pairs with no issues.

This time however, first 3 holes in the toe fine no problem. The 4th toe screw, screw feels weird (using a hand screwdriver), it's going in too easily and then as it hits the point where it should stop turning, no resistance. The screw is in the ski but it turns. At no point did I feel any real resitance. I'm thinking this might be a core problem?

Anyone experienced this?