Help Decypher a Feat

[Littha]

While writing some homebrew stuff I bumped into an odd feat in Oriental Adventures, Defensive Strike. Now it seems harmless enough but the wording makes me wonder.

If an opponent attacks you and misses while you are using the total defence action, you can attack that opponent on your next turn with a +4 bonus to your attack roll. You gain no bonus against an opponent that does not attack you or against an opponent that attacks and does not miss

Two things jump out:
What happens if the same opponent misses more than once?
Do you get a "free" attack from this feat?

The latter is the interesting one, "you can attack that opponent on your next turn with a +4 bonus to your attack roll" rather than "you gain a +4 bonus to attack rolls against that opponent next turn" suggests you might get a free attack out of this.

Supporting this is Defensive Throw its sister feat which explicitly gives you a trip attack.

[Solo]

I think you're reading too much into it.

[EjoThims]

I think the intent was just a +4 bonus, but the way it's written it implicitly allows a free attack, as 'you can attack' presumably even if not actually making an attack action.

Also, by default, it would not stack up, as it would be same source same bonus.

[Bozwevial]

That said, attacks of opportunity would be an easier way to handle this, if you decide to interpret it that way.