Sorry to hear about this. I too was considering Alumline but I hesitated because of some other members here experience. Too bad because they have some good welders and I've seen some pretty beds. I've heard of completely wrong dimensions, really bad installs, bad customer service etc. I ended up ordering a Scott agricultural platform style aluminum bed. I'll be piecemealing the boxes my self.. It landed today and I'll be inspecting it Monday. Best of luck. On the happy side it's a really nice bed and fixing this BS shouldn't be too hard a job for a good fab guy.
I don't know whether it was me not being thorough or just bad timing, but it seems like I've seen a lot more negative stuff popping up over the past few months (since I ordered mine) than I found beforehand.
Good luck with yours, hope it's as expected.
Its out of character for me to not go for the "best value". I never go for the cheapest, but I always make it a point not to overpay for "prestige". In this case, being a foundational component of the truck I'm trying to build, I bit the bullet, spent the money, tried to buy exactly what I wanted, and it ended up biting me in the ass. That's what stings the most.