Next/Previous links to display longer period than 30 days

Hi,

When filtering data in Clicky for stats older than 31 days I get error:

>>This report (with filters applied) has a maximum range of 31 days.
>> The date has been adjusted to 2013-02-21,2013-03-25. You can still view data prior to 31 days ago, you just can't view more than 31 days worth of data at one time.

1) I don't understand why menu offer me "Last 60" and "Last 90" days when I can't display such data

2) Would be great if instead of "Last 60" / "Last 90" menu offer "0-31 days" / "31-62 days" etc.

3) And when red message box with error would contain also "Show next 30 days / Show previous 30 days".

Thanks!
Ludek