[itsme]

The confused sequence is probably caused by the fact that ChordPro songs need a different number of pages in portrait and in landscape format. I think we discussed that already a long time ago.
If you want to try it yourself: unzip and import the attached .msf setlist, start at "2. Set", step forward and backward through the setlist and check the screenshot of the list and the "Next Song Indicator" against what is displayed and what you expect.
To fix it: it should not be too difficult to make sure that the song on the display and the next song shown in the "Next Song Indicator" do not change when the tablet orientation is changed. It is fully acceptable if another page of the same song is displayed.