Entries in Day View Don't Stay Where They're Put When Manually Sorting Them

Hiya, I like to manually sort my tasks and events in day view so they are in the order that I want to tackle everything. I've noticed that the event entries jump around and don't remain where I've dragged them to on Android (after I've closed the app and gone back in again). So each time I open the day view the event that is happening, say, at 2.30pm has moved to a different spot on the page. Thanks!