Re the vinyl shelf liner.....I just lay it out and, yes, from time to time I find some things have slid to one end. Not a huge problem since I am a huge fan of organizer/basket/thingys. Just lift out the 3 or 4 baskets, straighten the liner and replace the baskets. Less than a 5 minute job. I don't know that a hot melt glue gun would help matters. Think the truly hot one would melt the vinyl and the cool melt just doesn't work as well. No more often that this happens, I wouldn't worry about it.
One problem I'm having, though, is that Corelle discontinued the off-white solid color and I could stand to have a couple more large bowls....anyone have ideas where I might find these?