A small housekeeping detail...
When upgrading a play where the line has changed, I will grade both plays as one, but will use the new line posted when grading the play.
So if you post Siena -4 for 2 units and decide to upgrade with Siena -3 for an additional unit, I will treat it as one play on Siena -3 for 3 units.
When upgrading where the line has not changed, just add the units. Graded as one play.
On the flip side, if you're looking to downgrade a play, you can't just come in and subtract units. In this case, a new play must be posted as a hedge (or opposite side) of the original. Graded as 2 separate plays.
Just trying to keep the poster and myself on the same page when posting results, whether it be W-L records or total profit/loss.
Good luck.