Those are chords without the "root" note as the lowest note. A "A/C#" chord is an "A" chord with "C#" as the lowest note. In many cases you could just use "A" or "E" and it will sound fine in the song. And often there are normal chords that have a note other than the root as the lowest note. For example: Chord/A/nat/Major/v3 is actually has a C# as the lowest note. It is a form of A chord that can be written as A/C#. Similarly Chord/E/nat/Major/v1 is actually E/G#.

You can always create your own versions of a chord with different notes in the low strings. In such cases, it can be helpful to show the note names. Go to "Settings" and set "Chord String Labels" to "Note Name", then hit "Done".

purchased Guitar 1.41 some time ago.  I recently upgraded my iPod Touch to OS version 4, and GUitar no longer works.  I get the splash screen, then nothing.