This rare double incoming storm really doesn't present any serious problems. Since neither is expected to be that severe when they make landfall.
It's extremely rare, that they'd come in at the same time. But if they combined, there's absolutely no reason to be concerned. As the wind from the storms would play against, rather than with each other.
Also the outflow would cause a cooling of the surrounding water. That would further weaken the other storm.
I'll gladly take the rain though.