Wow, that's strange that a company like Ampeg would give out information that would damage their product and produce unhappy customers. In all honesty though, I have had issues with a 410 and 115 in my own experience that's why I'm changing up my rig and asking advice and other people's experiences here on TB, I am also a "newbie" here. Ohms law is ohms law, so now I'm totally at odds with this. I guess from my own experience and the comments from this thread, I will just have to stick with 2 matching cabs and give up the versatility of having a 115 flip top for small gigs but still, two 8 ohm cabs equates to a 4 ohm load.
And just for the record, the PF-115LF is not a "flip top" like the HE cabs.....its just a regular cab, but does sound very good