Duelist Feat and Shield Focus

[Flames of Chaos]

I'm playing a Buckler Duelist fighter (more commonly known in PFS as a Rondelero fighter), and I have a question:

I have the Duelist feat and am considering the chain of feats that leads to Shield Charge, which Requires Shield Focus. Do the bonuses from Duelist and Shield focus overlap, or do they interact with each other?

Duelist:
You trained at an elite fighting school and are skilled at fighting with the falcata and buckler.

Prerequisite: Dex 13, Exotic Weapon Proficiency (falcata), Shield Proficiency (buckler), Weapon Focus (falcata).

Benefit: When fighting with the falcata and buckler, your shield bonus to AC increases by +1 and you gain a +2 bonus on Acrobatics checks.

Shield Focus:
You are skilled at deflecting blows with your shield.

Prerequisites: Shield Proficiency, base attack bonus +1.

Benefit: Increase the AC bonus granted by any shield you are using by 1.

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Thanks for any help in advance!

[avr]

It looks to me like two different untyped increases, and unlike sizes or ability mods there's no FAQ saying those don't stack. I think you should get both +1's to your shield AC bonus.