{comments}
Matchpoints, ACBL robot individual
Whether or not you agree with the double of 1♥ (planning to rebid cheapest NT), 3NT over North's 3♣ bid should not require 22 HCP. And how likely is it that South will ever hold 22+ when East has opened and North has jumped? The current scheme leaves South without a way to bid 18+ to 21 HCP hands in this sequence, and needs correction.
[Heresy follows: Since North has made a limit bid, South should have the unfettered option to bid 3NT with any hand without fear that North will self-destruct. If/when this is corrected, I'd suggest that South's bid show no more than 13 HCP.]