When you create a custom module there is no system field displayed for "Modified Time", "Created Time and "Last Activity Time", they just get placed anywhere on one of your sections, so when you view the module in the mobile app, they are often in the middle of your data fields.
The current workaround I have for this is to create a new section and move your own fields up on to it until nothing remains on the section and then the above fields then stay on that section by themselves, I then place the other system fields such as "Created By" and "Modified By" etc... on the same section so I have a record information section that contains all the same type of fields.
Solution: Make the above fields visible so we can place them out of the way when creating custom modules. This will allow users to know where they will be displayed on the mobile app.