In Insights to the Daf(30:1), the Kollel wrote:
>> HALACHAH: The SHULCHAN ARUCH (OC 447:1) rules like Tosfos, that mixtures of all other Isurim of "Min b'Mino" are prohibited only "b'Nosen Ta'am"<<
Min be mino in other issurim are berov. There cannot be a nosen ta'am in min be mino. It's all the same ta'am.
Mi'd'oraisa Min b'Mino by other Issurim are b'Rov, although mi'd'Rabanan one requires Shishim (see clear statement of the Taz Y.D. 98:3).
You are correct that there cannot literally be "Nosen Ta'am" in Min b'Mino. I assume that the author of the Insight merely used the words Nosen Ta'am as that is in fact Shishim, which is the Halachah mi'd'Rabanan.
Kol Tuv,
Yaakov Montrose