thanks. that's helpful. It happened to me three times in only a few hands, so I suspect it is more common than imagined. With that kind of result,I might as well have a human partner.
When I play with three robots, often all the tables will make the same bid, say four hearts, with the exact same bidding sequence, and all the tables make 5 hearts, and my robot goes down one. I simply don't understand this logic. Would appreciate an explanation as this happens all too frequently.