In 2018 we still have the same bug on the iPad!!!
I notice that these comments are from 2013 and not much has changed. I have exactly the problem that the first user described. I regularly work either online, or using the app on my Android phone. However when I come to use my iPad app that I have not used for say 7 days, it overwrites the note that is currently showing with the old version from 7 days ago, modifying either my notes or my to do list. I also know that you can go and retrieve previous versions, but this is REAL PAIN, and should not be happening on the Premium version. I uninstalled and reinstalled the app and tried to change various settings, but I can still consistently replicate this bug, whenever I like! Strange thing is that it does not happen on my iphone app, only my ipad. Any answers for this?