1. My testers do an incredible job finding a lot of issues in the private testing phase. They point out a lot of things and add suggestions for how to improve the map, and some even work on these farms in real life and provide photos and feedback.
Typically 3-4 weeks before public release the map goes through a ton of changes and upgrades as I gather up all of the feedback and develop a public version. That does not mean that there are ZERO issues on public release, that is why I release a "public beta." Heck even the mapper I look up to the most, OxygenDavid, the best in the game, has fixed dozens of issues and is now on Version 1.3 of Witcombe Park (I am only on 1.1 of Paoli).
2. I just looked at the bin on Farmland 50 and in neither the normal or RCS version is the bottom white. Is this the bin you're referring to?: 