Shop glitches - You see these?

Problems I've encountered

1. The shop gets stuck in "sell" mode. Usually fixable by dragging another character in and out. I got stuck on sell mode once, permanently, because I had no more champs to drag over shop. (beginning of game)
2. After locking the shop, the shop doesn't change. This is expected… except the shop still doesn't change the next round even though the shop isn't locked.