Surging Flame Question

[Krensus]

Hey guys, just a quick question. Does the extra fire damage from Surging Flame stack with itself? For instance, if I hit something with fire resistance with a fire power, then action point to do it again, then on my next turn do it again, does my last fire spell do damage +10 or +5?

 

[Mentat55]

Generally, bonuses from the same source do not stack.