Ign2-6 are not absolute advance, but instead the degrees being pulled back relative to Ign1. The 2.3s generally aren't an issue but you have some 4.5s and 5.3s which could indicate knock in those cylinders.
The values like 60, 90, and 160 can't be real timing adjustments as those are far outside the window for ignition. You'd be firing at random times like bottom dead center of the intake stroke or halfway through the exhaust stroke.
So either something's very wrong or those are some kind of default/out of range values. May be worth posting over on the JB4tech forums.