Some alarms randomly getting set for day after tomorrow instead of tomorrow

[Powersource]

In this screenshot you can see some alarms saying "today" and some "tomorrow". The settings for both of them are the same. But if I enable a "today" one it goes off as expected, but if I enable a "tomorrow" one it will go off the day after tomorrow (toast for that visible in the screenshot too). Although if i open a "tomorrow" one and click save then it turns into a "today" one.