I have had similar issues previously, and I feel your pain. Polaris "corporate" has royally pissed me off a few times over the year (sleds), but I guess I'm a glutton for punishment and I keep coming back as I do like their products.
Here's the problem: there is a TREMENDOUS amount of inconsistency with dealers. For example, the Rangers get shipped in metal crates with the ROPS cage disassembled and tied down in the bed/cab area for final assembly at the dealership. Polaris is not directly responsible for the cab installation - that is on the dealer. The cab installation isn't extremely difficult by any means, but for a hourly wage mechanic who doesn't give a flip, the cage can be installed poorly and cause a ton of issues with cab fitment. Same goes for other accessories.
I agree Polaris corporate needs to own that part of the process as well, and it seems crazy that they don't hold their dealers to a higher, more consistent standard. Hope you guys get it figured out.