delericho
Legend
"Enhancement" bonuses were mentioned earlier. These aren't a separate bonus type, but simply an addition or increase to another bonus.
For example, a +2 Enhancement bonus on your armor adds to your Armor Bonus. A +2 Enhancement bonus on your shield would stack with the Enhancement bonus on your armor, since it's enhancing your Shield bonus. A second Enhancement bonus to either armor or shield wouldn't stack though.
Here's a question:
As noted by the OP, dastana provide an armour bonus that explicitly stacks with the armour bonus from padded armour (or some others).
If the padded armour is magical and has an enhancement bonus, this effectively adds to the armour bonus.
Likewise, if the dastana is magical and has an enhancement bonus, this effectively adds to the armour bonus.
But, do the two enhacement bonuses stack? They're both adding to armour bonuses so, per the normal stacking rules they should not, but on the other hand, they're each adding to a different source of that armour bonus and then two sources explicitly do stack, so...
(IMO, the real issue here is the dastana, which probably shouldn't exist, or at the very least they should be re-written: "If worn with light armour, dastana increase the armour bonus by 1. If worn with medium or heavy armour, dastana have no effect. If worn on their own, dastana grant an armour bonus of +1". That way, the stacking issue goes away - even magical dastana, when worn with magical light armour, will only increase the armour bonus by 1.)