Listing Time Doubled on Renewal in 6.5.5

I have set up test listing packages in responsive directory theme to last 1 day so I can review the whole process for my customers but just testing the renew button in 6.5.5 I have found that each listing package is actually renewing for 2 days.

As I plan my directory packages to last for a year this could be quite problematic. Has anyone else had this issue with 6.5.5?

Any help would be very gratefully received!

Thank you.