That's actually a big limitation on 3d6 Unlucky, must be humorous! Sounds more like your looking for a zero point special effect, so we can all be laughing when this happens, your misfortune just a pie in the face with those odd distractions, nothing to worry about, good thing nothing BAD happens! If it's just humorous special effects you want, we can keep that whenever you want, if it doesn't effect combat.
When you roll a point or three of Unluck, your not cursed for the day, that's not how Luck/Unluck works, the whole point is to roll once per combat & to not let you know until it takes effect.
When you go to buy Luck, just add 15 points to your total cost to buy off this limitation with Luck activation.
Rather than ignore the 3d6 limit, buy Luck twice or more with their own rolls & limitations, please no partial limitations:
Lucky 3d6+2d6 & 15 points Unluck suspended with first 3d6 roll, 8-, 40/13-10=3 points
Lucky 3d6+2d6, 14-, 25/16 & Luck 1d6, 11- with first 3d6 roll, 5/2 totals to 21 points.
Each combat requires two activation rolls: one for 3d6+, 3d6 & 1d6 activated at various levels; another for 2d6 & 2d6, 8- & 14-.