Hi,
In my experience one of the most effective ways to interpret the findings of a PPIVM Ax is to re-assess after treating a level - your choice at which level to treat will be dependent on your overall impression of the condition i.e. chronic v acute; irritable v non; pain thru v end ROM etc, etc. I tend to always treat the most relevant hypo segment as that gives me most information and go from there.
Unfortunately interpreting findings immediately after/during the PPIVM Ax takes experience and relies primarily on recognising patterns of presentations and fitting your palpation findings into the whole picture.
Good luck.