I just installed Traffic Master laminate flooring in my kitchen. I just notice at a seam about 3" long that, when stepped on, drops down. The groove side is not engaged into the tongue side and I think the tongue side of the board maybe damaged. Any idea's how to fix this? I am affraid this will get worse over time.

Remove the flooring to that point, fix the problum and reinstall.
Not what you want to hear but it is what it is.