I knew that Kanak herself was going to give Uma the divorce papers, but just thought this was part of the cat & mouse game with maasisa. Your explanation of the wording makes perfect sense...Kanak has already asked Uma to trust her & she has managed to win his trust back, so the wording on
the divorce papers should Uma to question his actions and over time he will realise how interpreting faith in such an extreme manner hinders his relationships & the way he treats people (he has already had an example of that with the Payal situation)
I think the track will eventually result in Uma asking for kanak's consent for marriage and the both of them will remarry... but I am a bit worried that Uma may react badly and think that he is not worthy of Kanak & may instead try and free her, so she can live a life on her terms. He may think of this as his punishment for forcing her into marriage (we all know how much Uma likes giving dhandh to the guilty