Understandable. I play guitar and even then playing simple songs on the pocketguitar is a task. It is useful though for guitarists to come up with riffs and such and with the editable fretboard you can get 20+ frets.
Although you are correct in your stating that "iAno is more of a real instrument," if the guitar program gets a much needed patch to fix some of these bugs, it would definitely start getting close to iAno's capabilities.
I think the guitar program needs to take a page out of iAno's book and have the option to scroll down the fretboard, having a full guitar of frets without making them millimeters in width.