I no longer have the full subscriber access but yeh I think you are correct.. starting at the 5th fret it would go:

(0, 3,) 5, 8, 10, 12, 13, 15, 18, 20 etc

0 and 3 are the notes proceeding the 5th fret but are still within the same scale. It's all about the intervals... knowing the intervals between the notes (or between the frets if it makes it easier to understand) makes all the difference.