Beemerboy
Just One More Coat
Depending on what you are topping the glaze with you may in fact be cleaning off the glaze you just put on. Or the chemical make up of the wax may in fact just blend with the glaze weaking both as far as durability or hiding effect.
I haven't seen this as a factor. I've done many cars with glazes and sealant and the same number with just sealant. I can tell the difference in the finish!