I'm having the same problem where the game crashes after trying to hand in items at the general store. Happens on Nexus 6 and iPhone 5s. I'm also getting handguns as one of the craft items, which I think belongs to act 2.
Same issues. Game glitched into Act 2 and had me build the jail and now outlaws are dropping guns. Trying to hand in any items at the general store results in game shutting down or locking up/freezing.