well, I used WL 005 to start and plan on using champagne to finish. I cold crashed because I plan to rack to secondary for the next dose of yeast and something strange happened, or at least I think it was strange. The beer separated into two distinct layers. a bottom thick very sweet and a top thin watery layer. I didn't take readings of either since this in only a 1 gal batch I couldn't afford to lose that much of my volume. I racked about 12 hours ago and now that the beer is back up to about 70 degrees or so it seems to have homogenized again. Is this sort of separation normal??