Anyway, I knew it was too soon. After 3 nights in a row of sleeping through the night, which I explained here as technically meaning 5 hours, but in the Blueberry's case about 6-6.5 hours, he went back to needing a 1:30 a.m. feeding. In other words, I'm getting two 3-4 hour blocks instead of one 7+-hour block. Frankly, I don't mind terribly as though I appreciated the sleep, I was definitely a tad uncomfortable after not nursing for so long. Maybe it was part of another growth spurt as more sleep sometimes accompanies them or perhaps just a teaser to give us hope. Alternatively, the past 2 nights might be the growth spurt. Only time will tell.
Perhaps, we have the next Harry Houdini in my Mr. Wiggle Monster.