Because A: It is under the rate of growth already so it means that there is a loss, and B: 368,000 people left the workforce so combine that with the 120,000 we grow each month and you have nearly 400,000 people who were left with out a job this month.
And hey that 750,000 loss came when we were in the mist of a bad recession. If you want to say that Obama's policies have failed and we are slipping back into a recession, then it is a pretty accurate comparison.