the priority bonus is increased proportionally with every bit of HP delegated.
your 10HP currently grant you a bonus of 38 minutes in the dust queue.
To get a 100% fulfillment guarantee all the time you'd need about 12hrs of priority bonus.
but there's also a debuff for already received dustvotes, so even if you had a 12hrs bonus you'd quickly get debuffed by the executed votes... it's a rather complicated min-max algorithm.
tbh... 10HP is perfectly fine for your account size and you should soon see some bunny action.
P.S.: the dustvotes in the past were likely executed for someone else being watched by the bunny who voted on your content because you weren't on the watchlist yourself before