I'm still trying to learn a good bit about some brewing basics, and the internet is only so much help for specific-questions.  I broke the seal a month or so back on a brewing rig that I purchased here through these forums.  A friend and I brewed an APA and we used bottle conditioning.  A week and a half back I tried my "X" bottle (first-filled).  It was still a little cloudy and a little light on carbonation, but I was very pleased with the flavor.  I let it rest a while longer and 2 days ago I tried a second bottle and thought it was perfect (although still a tiny bit cloudy).  I put a 6 pack in the fridge and of the next 4 opened, 3 of them seemed too carbonated ... far too much head, and I was losing the flavor of the beer in the carbonation.  The 4th actually flowed over when opened, but after that tasted fine.

So I assume that means some of them had too much sugar in the bottle conditioning, although I don't know enough to be 100% sure.  My questions are:

(1) How would some of them have too much carbonation but not all?  Woudln't it be systemic throughout the batch?

(2) Is this in any way fixable or if there is too much carbonation will the extra acidity prove fatal to some of the critical aspects of the flavors in the beer?  i.e. is the beer already signed its "do not resuscitate" order?

Thanks in advance.