Guild Wars 2

If i´m blind and i use a AOE attack i will miss everyone in the AOE area.
If i use a sigil that grant poison in the next attack, after switch weapons the AOE attack will only poison on target in all of them that are hit.

Is there a bug with blind or with the sigil? Or is the description of the sigil incomplete?

Notice this hapens too with the signet of might. When you use signet of might (active efect) and do 1 (one only) AOE skill you will use all 3 unblockable attacks if you hit 3 or more targets in that AOE (ex. earthshaker). By the same rule, if you are blinded you will miss all targets but you should only miss one.

Can you fix that please?