Alchemist Fire Stacking

[Cfoot]

1) If our group's ranger hits a bad guy with AF on his turn and then next up, our monk hits the same guy with an AF, on the next round does the target take 1d6 or 2d6 points of fire damage?

2) If our alchemist hits a bad guy with an explosive bomb (so that he is on fire) and then our ranger hits the same guy with an AF, on the next round would he take 1d6 or 2d6 points of fire damage?

Thanks

[Aram bin Kaleel, Pathfinder]

The damage is for being "on fire". Once you're on fire, you can't be 'more' on fire. So I'd say they don't stack.

[Cfoot]

I actually think you can be "more on fire", but maybe I am misunderstanding the concept in regards to game mechanics.

[Nevan Oaks]

I do beleive you can be "more on fire". now per RAW not 100% sure.

I would still say yes using the RAW from the spells section.
First the general rule:
Bonus Types: Usually, a bonus has a type that indicates how the spell grants the bonus. The important aspect of bonus types is that two bonuses of the same type don't generally stack. With the exception of dodge bonuses, most circumstance bonuses, and racial bonuses, only the better bonus of a given type works (see Combining Magical Effects). The same principle applies to penalties—a character taking two or more penalties of the same type applies only the worst one, although most penalties have no type and thus always stack. Bonuses without a type always stack, unless they are from the same source.

Now this would seem to say that the damage would not stack, but then there is a sub rule:
Instantaneous Effects: Two or more spells with instantaneous durations work cumulatively when they affect the same target.

so by this the damage would stack, though as a DM I think I would set a cap. Each flack of AF is like a pint, one would not cover the whole body in flame but after a number of flacks the whole body would be covered and then you would just be looking at the duration of the burning.

[Dust Raven]

Given how Alchemist's Fire and Explosive Bombs are described, I'd say Alchemist Fire stacks with itself and any "on fire" damage, as the description doesn't even mention being on fire. It just says the target of a direct hit takes another 1d6 fire damage the following round. Explosive Bombs specifically states the target catches fire, so I'd say any other effect which causes them to catch fire will not catch them "more on fire." The rules for catching on fire from an explosive bomb differ from those for catching on fire in the CRB, so I'd use whichever is more restrictive to the target if the target is under the effect of multiple types of catching on fire (so dousing the target in oil will not cause him to take additional damage when struck with an explosive bomb the following round, but would cause him to catch fire normally if struck with some other fire source).