Does an ‘agree’ post clearly act as a proposition in its own right, thus cancelling it’s poster’s own previous proposition?

I think it’s looped up okay; an “agree” statement is “taken as a suggested distribution” here, and from the existing rule “a comment that includes a single suggested distribution” is a Proposition.

What if I say I agree with both Josh and JonathanDark, but they have different proposed distributions?

It’d be equivalent to you just typing out those two distributions in full in the same comment, if I’ve written this right - which wouldn’t count as a valid proposition from you because your comment doesn’t include a “single” suggested distribution.

okay yeah that makes sense