[Bbradley62]

Maybe West doesn't want to add insult to injury? Matchpoints, in case that somehow influences West's decision.

---

[cloa513]

Maybe it simulates that the bidding will go on to some bid with less down.

[georgi]

This should be fixed for next updated and GIB not to miss to double 6N/7N with 2/1 Aces.

[cloa513]

But then GIB will actually have to cash those ace(s) from lead at least, how do you ensure it actually does that? If it plays like it usually does, declarer will cash 12/13 tricks in other suits to make.

[cloa513]

Clearly South is insane not strong enough for 2 over 1 bid if the opener can be light but the bid descriptions are just about totally useless- no limit to HCP or TP beyond original limits.
But North also insane, South can't sign off in 3NT and just because North has one more spade continue on to slam.