Answering my own questions here.
The answer is YES. A zero interval on any row would make that stage of the scale redundant, the same as the row below it. Figuring this stuff out in real time is great, the scale editor UI is super simple.[quote=“lloydcole, post:38, topic:2409”]
Can scales reach beyond their octave? ie. 6 intervals adding to more than 12 semitones…
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YES. The only limits seem to be the scale cannot have more than 7 notes and the max interval between notes is 7 semitones, so if you wanted you could make a cycle of 5ths scale…