Multiple mods on a single item

Is this actually possible? For example, on a staff of defense I want to put the mods Damage: 1d6 AC: 1. Doing so however creates this weird bug setting AC in the hundreds. Is there syntax that I'm missing? Edit: Figured out that you had to spell out Armor Class instead of just putting AC. It applies both mods correctly but does create a weird UI thing where it adds the item class to the weapon damage.

Sounds like you're talking about a specific character sheet/system. Is it DnD5E? I think all the 5e sheets have wiki pages that can help you figure out these things in the future while you're waiting for answers.

Apologies, I should have been more specific. That's correct, that's the sheet I'm referring to. I've looked at the wiki, but it doesn't seem to address multiple mods on the same item.