stupid policies for upgrades

I upgraded my daughter's phone the other day.  It is scheduled for delivery tomorrow.  They would not let me upgrade my phone because the agent said "there was a problem on the back end."  What?  Today I tried AGAIN to upgrade my phone but the comcast idiots will not allow me to upgrade my phone because the other order is "still pending."  Seriously?  Why a pending order prevents them from completing a second order is just stupidity.