Times are odd
I've noticed a few times that the times are not entered correctly. For instance, AM and PM is a game of luck, some times it works, other times it fails. If I enter "13 July @5:00pm" quite often it comes back as 5am. There also seem to be inconsistencies with minutes. Yesterday I entered a task for 4:15pm, which went to 4:15am, and when I edited it again, it insisted on 4:00pm. Three edits later and the time stuck.
I've had this happen to me on the web version, the Windows desktop version (both Win7 and Win8.1), the Thinderbird Plug-in and the Outlook plug-in.