Archetypes with same feats

Fighter Dedication and Eagle Knight both have Reactive Striker as an available feat.
If I go fighter dedication early, pick up a few feats, with one of them being reactive striker, and then later pick up Eagle Knight, does the Reactive Striker feat i grabbed earlier count towards the number of archetype feats i need before i can grab another dedication feat?

2. Fighter Dedication
4. Reactive Striker
6. Fighter Resilience
8. Eagle Knight Dedication
10. Interpose
12. <- THIRD DEDICATION FEAT HERE

Now thats a question that I don't think has a proper answer, Regardless of how I look at it you essentially decide which archetype you pick the feat from when you pick it. So if you had both dedications and then later picked Reactive Strike it could either be a Fighter or an Eagle Knight feat.

Lets begin with the fact that Reactive striker was picked before the Eagle Knight, That alone means it wasn't picked from Eagle Knight and probably cannot be considered an Eagle Knight Feat.

And what would instead happen if you were to retrain Eagle Knight later, If Reactive Strike does count as an Eagle Knight feat in this scenario then you couldn't retrain Eagle Knight RAW despite having picked Reactive Striker before the dedication.

What I rule, and what I have seen most often on these forums is that if you take the feat from the class feat list directly, then it is only a class feat and does not count as an archetype feat for paying off the archetype dedication. If you take the feat as an archetype feat, then it does count towards paying off the dedication.

The reason for this is because of the level difference that is typical for these types of additional feats. You can get the class feat at an earlier level than you can get the same feat from the archetype. If you allow the feat to qualify as an archetype feat when taken at the lower level of the class feat, then you can pay off the archetype dedication earlier than designed.

Edit I didn't notice that we aren't talking about Fighter base class initially: And in this case with Reactive Striker being an archetype feat from Fighter Archetype rather than a class feat, there is even less of a case for it counting double for both Fighter Archetype and Eagle Knight Archetype.

I wouldn't allow one feat to count towards fulfilling the requirement to take 2 archetypes feats before you can take another dedication.

Sure, it only applies to the archetype you took it from. We know that the rules care where you're taking a feat from (this is why the class traits get removed when you take a feat from an archetype that lists it under Additional Feats).