I have experienced this too. I was trying to book award tickets and the agent said that availability would differ based on whether I was or was not a part of the travelling party!
Originally Posted by flipside
EXP's REALLY do get expanded award availability..
I was trying to book a J award GIG-MIA-GIG and expertflyer and smile's tool had no U on the day I wanted (but strangely enough they had plenty of "C").. I called up and it was available.