I ordered one of their doors recently and before I even had it up and running on my new coop I received a call from the maker. A very polite gentleman informed me that some of their doors recently were shipped out with faulty boards. I checked mine out and sure enough mine was bad. I called them...
You can place feed in a freezer for a couple days to remedy weevil problem. Lots of people do this as a precaution every time they buy new feed for pet birds.. parrots and the like.