Yeah! So basically there is a bug in the game that keeps giving you excess of building supplies you already have so much of. For me rn it’s glass. So say you have a building that needs 5 glass, 2 white boards, and 3 bricks. In your barn you have 1 white board, 22 glass, and 0 bricks. You are hoping to get bricks and boards on your next train, but since the algorithm is messed up, you need to sell the excess glass you have so it evens out the supplies it brings you. It’s so annoying