Too much glue creates problems, the same as too heavy of a weight on the surface. Take a empty soup can and throw your pocket change in it every night until it's almost full. That will give you about 2# of weight, which is all you need. If your weight is to heavy it squashes all your glue out from between the surface and the wood, you need that thin layer of glue between them so the wood can flex a little without breaking loose, because it will swell and shrink a little from moisture.