This doesn't make sense. Are the graphics and their labels mixed up? Are the images actually a scandicus subbipunctis and a podatus subtripunctis? Source: Joseph Robert Carroll: An Applied Course in Gregorian Chant. Toledo: GIA, 1956.
Yes, the first is of a scandicus (neum of 3 notes ascending) with descending notes and the second is of a podatus (neum of 2 notes ascending) with descending notes. You are absolutely correct.
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