Well the sound of rowdy combat is not the same with the sound of disemboweled goblins
The ochre jelly would not add even if a someone run for reinforcements (and on most cases it should try to eat the runner). Lurkers are the real issue since they might find the players being in combat as the perfect opportunity to attack. But again shouldn't those lurkers add in stealth a round or two after the players engage in combat for a great ambush anyway?
I am just saying that double encounters should be really rare and if you follow the rules they are very much likely to be lethal unless the characters are early in the adventuring day and/or leader heavy.
And if the encounter seems impossible when it goes double, you can always lay down arms and surrender . . .

I am just saying that double encounters should be really rare and if you follow the rules they are very much likely to be lethal unless the characters are early in the adventuring day and/or leader heavy.
And if the encounter seems impossible when it goes double, you can always lay down arms and surrender . . .