PBA: It could be because we’re working with a slightly different assumption coming in here. You are assuming that there is a real Safek B’rachos because it’s a Machlokes Rishonim and therefore we should be Machmir without additional support. I hold like Rav Schachter that the reason we’re Machmir on not counting with a Bracha anymore is to respect the Shittah of the Bahag. (Rav Schachter points out that there are several cases where the Bahag is a complete Da’as Yachid but we still are Choshesh for his opinion in the Shulchan Aruch. This is because the Bahag had his own Mesorah from the Savoraim and Amoraim so even though his Shittah is against our Shas and our P’sak, we still treat it with respect.) Since that’s the reason we’re Machmir here, any Tziruf of a another Shittah is enough to allow you to make a Bracha (which is part of the reason the P’sak I grew up with and was told that what is accepted by most is not like that Sha’arei T’shuvah above). Thus, this is a case where finding Kulos to allow one to make the Bracha is perfectly called for. Does that make sense? Does that explain why we’re coming at this from different angles?
Ders: I don’t know what you mean by that. If you give a specific example I’ll try and explain what I hold though.