Team Velocity (Report Template) Order of Data

Is there any way to control the order of the data in the Team Velocity graph ?
We have a Package / Release / Iteration tree structure in our development, with iterations called:
Iteration 1 (R1)
Iteration 2 (R1)
Iteration 1 (R2)
etc.

The iteration selection list box uses alphabetical sorting for the data entries, which means the order on the graph, so we get

Iteration 1 (R1)
Iteration 1 (R2)
Iteration 2 (R1)

And not date order, how do we correct this to see valid data.

2nd is there a way to get an average line on the graph