1) Items/weapons show some stats requirements in red colour (like rquirements not met) although the respective character who wants to equip it meets all the requirements. The item can be equipped anyway, so it's likely just the wrong colour...
In the screenshot, you have opened the inventory of Kathlyn (who has the weapon and meets the requirements). However, you have the other character selected (golden window around character portrait), maybe he doesn't have the required strength?
