As long as its fermenting and finishes up close to where it should then I wouldn't worry about it.
Sometimes I don't get much krausen, sometimes its rushing out the blowoff tube. Like I said, no biggie as long as the yeast do their job.
EAC - 5/2/14
Growing Hops in Key West, FL....
Primary : French Oak Muddy Waters Bourbon Chocolate Stout
Primary : Edicion Regionales Inglaterra
Primary : Oh My Darling Clementine Wheat
On Tap : Red, Wheat, and Blue, Muddy Waters Bourbon Chocolate Stout 2.0, Cayo Hueso Cream Ale, Atocha Amber
*Member: The HBT Sweaty Fat Guys Cigar club