Used two of Brewferm's Diabolo kits to brew a five gallon batch of golden strong a few weeks ago. Didn't realize these kits call for additional sugar to be added during the boil. Fermentation was hard and heavy within just two hours. Then my airlock stopped bubbling less than 48 hours later. Like a moron, I completely forgot to measure my SG. I took a reading when the airlock stopped a d it read 1.020. 2 days later, 1.020 again. That's when I found out about the sugar from a brew shop employee. He told me I'd need to add two pounds, so I boiled 2 lbs. of malt extract (his recommendation) and added it to the mix. A week later, and my hydrometer was still reading 1.020. FG should be around 1.010. I figured whatever, I'll move out of primary and maybe I'll still end up with a drinkable batch, just with a lower ABV. I skipped over secondary and went straight to adding priming sugar and bottling. Beer tastes a little green, but no off-flavors or smells. However, I seem to have a lot of yeast in suspension. Does this mean it's still alive and I should have done more to wake it up? I'm pretty worried about bottle bombs at this point. A day after bottling I saw what looked like a sort of membrane hanging off the surface in one of my bottles. "Yeast raft?" I thought. Poured the bottle and noticed there was already a good amount of carbonation. Still no off flavors or smells, but also, still tasted like it had some work to do. Very estery, apparent alcohol smell but nothing astringent. Now I'm seeing the film on some more of my bottles. I'm nervous. Not sure where I went wrong (other than forgetting the sugar during the boil and not measuring my SG), but not sure I should keep these bottles. Thoughts? This "membrane" is thin and yellowish in color. It isn't just a film though. It clings to the top but kind of folds downwards when I turn the bottle on its side. It doesn't cover the whole top, no fuzziness to it. It looks slick. Any thoughts?