Torah Temimah cites Shabbat 71b.
It was stated: If one ate two olive-sizes of forbidden fat in a single lapse of awareness, and then became aware of the first and later of the second — Rabbi Yochanan said he is liable for two offerings.
Diyuk of successive “hod’a” moments — each distinct awareness creates a separate obligation even within one original he’elem.
Separate moments of awareness for distinct acts, even when those acts originally shared a single lapse of awareness, generate separate chatas obligations. Rabbi Yochanan’s ruling means that the Torah’s emphasis on “when it becomes known to him” treats each awareness event as independently generative of liability. Consequently two chatas offerings are required rather than one.