2NT response to a minor shouldn't need 13 hcp?

[eseidel]

From jill:

"I just bid a hand where I open one club, opponent over calls 1 diamonds, and my partner bids 2NT. your program says that is no trump bid over minor...13 to 15 points. I am told that two no trump bid over minor should be 11 to 12 points. Why wouldn't you just jump to three no trump if you had 13 to 15 points?"

http://z3b.saycbridge.com/explore2/1C,1D