Bread didn't rise in the oven :(

So, I made Peter Reinhart's 100% whole wheat sandwich loaf, which I have made one other time.  It starts with an overnight sponge and soaker.  The first time I made it it was awesome, but this time, the second rise seemed a little lame, didn't really rise to the top of the loaf pans.   Then, in the oven, it didn't really rise much at all.  It's out now, and it looks like a brick.  It didn't even really brown very nice.  Any ideas what might of gone wrong?  

I'm not sure if it matters, but I doubled the recipe for two loaves (so, I actually have two bricks).   I was careful to follow the formula, but I guess I wonder if I didn't knead it enough for two loaves.