Ikon wrote:
I would think your installer had
forced it together rather than "snapped" in it.


My installer is actually snapping it, instead of hitting it slighly
with a hammer (as the manufacturer's instruction suggests !) He says
that the locks have 2-component glue, and if boards are moved along
each other with a hammer the glue will lose its potency.


Your installer is an idiot. It is GLUELESS. You
can take it apart and install it elsewhere, even a
year after installation.