Unfortuantely my mind reading doesn't seem to be working this morning.
Without specific information about your account and your reservation, there's no way any of us can help you figure out why your payout was less than you expected. You'll need to contact Airbnb directly so they can assist you. The number is easily found by doing a basic web search.
Yikes - I'm pretty sure I found your problem. You have THREE (!!) cancellations. I'm betting the first one fell under the "you've never done this before, so we won't charge you" policy, but the two others were likely assessed a $50 penalty each. You never, NEVER want to cancel a reservation.