Bandwidth Usage Page Error

When looking at the Virtualmin->System Settings->Bandwidth Monitoring->Show Usage Graph page, the "Show Statistics for this month" drop down box has the current month listed correctly but other months to choose from are not correct:

Example:

Current month: 20/Mar/2008 - 19/Apr/2008

The rest of the drop down box look like this:
19/Feb/2008 - 18/May/2008
20/Jan/2008 - 18/May/2008
21/Dec/2008 - 18/May/2008

Every single entry after the current month ends a month from now, creating an ever increasing amount of time that it's looking for.

Status: 
Closed (fixed)