GMAT Verbal & Essays

Hi there,

I was practicing SC and came across this one: blahblah as much as twice that blahblah.

I was looking at the answer choices, and I didn't see anyone that had "twice as much as." As it turns out, the correct answer is blahblah as much as twice that blah.

Just curious, I thought the usage of "as much as twice" is incorrect. It should have been "twice as much as." I rarely see people write this.