Confused by Item of Power

[sinker]

Or do you mean that even though the Catch is mandatory if it were something Common (+2) you'd get that bonus but it just doesn't apply here because it's an item of power?

What he's saying is that the total cost of an IoP is always -1 or more. So the refresh refunds can't be greater than the cost. However if you increased the cost (by say increasing your recovery to supernatural) or decreased the refund (by switching the IoP bonus to your sword) then a higher refund catch would then apply.

As far as True Forgiveness goes, if we're going by the WCV standard, then the person doesn't have to forgive you personally they just have to have experienced True Forgiveness recently. Additionally there could be all sorts of other (non-vengeance) reasons why they are harming you. To protect another would be a great example.

[Tedronai]

they just have to have experienced True Forgiveness recently.

Recent vs current, or even how long 'recent' lasts, and what might bring it to a sudden end, is not well established.
Dresden didn't lose the protection his True Love afforded him because he fell out of love, but because he engaged in intimate acts with someone not party to that (possibly former) exchange.
And for a +0 Catch, erring on the side of exclusivity should not be unreasonable.