Beleive it or not, the default is acutally to allow for the burst to be 2x CIR. The occurs because the traffic will be able to burst Bc + Be every 10 ms.
Using your output as an example:
Bc = 10,000 bits/interval
Be = 10,000 bits/interval
Interval(Tc) = 10 ms
Replishment Rate = 1250 bytes/10...