It doesn't matter if all the seeds are from the same pod, if they aren't stable they will all be different and if they recently crossed, they will be even more different(except f1s which will more or less all be the same). One pod could potentially have several different crosses of seeds within it as well as some true seeds.
Like AJ said, when you get a variety you like, with features you really like, its best to isolate and selectively breed until they start to look more consistant, especially when they are known hybrids or assumed hybrids like in AJ's case
It doesn't happen overnight, this is my 5th or 6th year growing Scorpion_BT and they still seem to have the most variability in pod shape of all chile plants I've ever grown