Why not positional variation?

[Aga Tentakulus]

   

When I look at page f27v, the writer looks very insecure to me. The text and the characters do not seem to be constant. I would even categorise this as scribe (xxx).
When I read books, I often notice that endings are shortened but also written out. ( Titus - Tit9 / Glarus-Glar9 ) by the same person.
It is possible that on page 27v the endings were written out.
But it is also possible that iii stands for the tenses. ( future, present and past ). Here the form would change simply because of the amount of (ii-iii-iiii).
Finally, the variants of the characters. In my opinion, the most important decision maker is the arc ‘)’.