Legendary vinyl top problem

I bought a black vinyl top a few months ago from Legenday after hearing good things, it was installed last night with an appropriate adhesive. I learned today that the vynil had apparently separrated from the canvas? backing. Has anyone had this happen? Has anyone had problems like this with other Legendary products? Has anyone had a good experience and outcome with another vinyl top producer? Thanks for any input. No pictures, sorry, I wasn't there first hand and by the time I learned of the problem he had already repainted the roof.
Tom
Ps, My means of conveyance is a '71 Dart Swinger.