windshield issue

[c50rob]

Last Friday a guy attempted to install new front windshield in my truck, finally gave up after two hours and ordered another. Today he showed up with new glass, both are from Pilkington I think was the company name, anyhow you can lay one glass over the other and a definite difference in how the corners of glass are curved. Well after two more hours he gave up and said he will order another and be back by first of next week. Has anyone had same issue? Is another vendor for the windshield better than another?
Thanks in advance.