Honestly, I don't understand how to use the subline numbering feature. I would expect to be able to refer to the first of two identical words in the lemma of the apparatus.
Tertia est – supposito, quod sint passiones totius coniuncti, cum non insint toti nisi ratione partium –, cui parti corporis uel animae debeant attribui, utrum uegetatiuae aut sensitiuae aut
2.1 aut ] om. M
Here the 2.1 lets us know that the lemma refers to the first instance of aut in the second line. Isn't this possible? I don't understand the use or function of subline numbers as described in the documentation.