Couldnt find documentation regarding the difference between dd/mm/yyyy and d/mm/yyyy, however I have found documentation regarding issues where the date format displayed is not in accordance with the regional settings, which is similar to what we're experiencing. One way found of fixing this is to edit the notes.ini to only have top lines, eg:
[Notes]
KitType=
Directory=
InstallType=
FaultRecovery_Build=t value>
Timezone=
being the actual value in the notes.ini, ie Timezone=-10.