Bondarzewia berkeleyi or no??

Almost on the exact spot where I found those "buns" on August 9, 2005, I found this new mushroom on August 18, 2005.

This was about 4" across

Side view.

Four days later I went back and this is what it looked like then.  It grew to about 8" across.

Side.

Is it Berkeley's Polypore or not?
I have difficulty understanding how this could be the same mushroom as shown here.