do/done auxiliary

[Catherine Rudin/HU/AC/WSC]

Bob wrote:
...?uN crops up on most Siouan
languages as a part of various enclitics signaling
'past' or 'perfective', including but not limited to,
Dhegiha -noN/-naN, glossed 'past' by Dorsey,...

Is this the -noN (1st person -noNmoN) that I always gloss "usually" or
"habitual"?  How would past/perfective give this very IMperfective meaning?
Or are there (sigh) TWO -noN suffixes?   Catherine