When my players use the a power that is applying weapon damage and then check the box to apply the attack twice it only uses their weapon for the first attack. The second one says its unarmed. Not sure how to fix this.
Okay, I can't reproduce that - when I use "one creature, two attacks" it assumes that the same weapon is used both times (for instance, in my test campaign the sample character has a dagger, and it shows "dagger" in both tooltips). I think I need more information about what exactly is being checked, what the exact details of the power are, etc.