Help please!!
Not trying to be harsh, but no one can really help you, and it sounds like you're screwed. Honestly, I've heard nothing but bad things about the mole rats. As a heads up for next time, upgrading rooms makes enemy attackers much stronger, and therefore harder to kill/easier to die from. It's suggested that you don't upgrade rooms, but rather merge rooms until your dwellers are decent levels and you're well stocked for weapons.
That definitely sounds glitchy, but unfortunately there's nothing that can be done about it until the devs improve the game.