Club level Swiss Teams.
South opens 1NT in second seat and West overcalls 2♣, promising clubs and a higher suit. North bids 2♦ which is alerted and explained as a transfer when East asks. East passes and South bids 2♥. West continues with 2♠ and East corrects to 3♣ which goes three down.
During the play of the hand it is discovered that North does not have a transfer and South has rather good support for hearts. North-South are a first time partnership, but their card clearly states that systems are on over double and over 2♣ after a 1NT opener.
1) West claims that his decision to introduce his second suit was based on the expectation of finding partner with short hearts and therefore more likely to fit one of the black suits. Do you adjust?
2) West also claims that South has no right to secretly assume that North has misbid and should compete to 3♥ with five-card support. There is no mention of any UI to indicate that North has made an error. Do you adjust based on this?
3) A question for offline directors. When you arrive at the table, the hand is over and the cards are in the slots. The players want to give you the whole auction with the various alerts and explanations before giving you the slightest hint what sort of problem this is. Once they've recited the three-minute auction in ten seconds, they then proceed with the arguments as you are still trying to get the auction straight in your mind. This is a sure way to lead to difficulties and in this case the difficulty was that I left the table with the board and a misunderstanding: I thought that it was a mistaken explanation and not a mistaken bid. As a result, my initial ruling was not the same as my eventual ruling when my mistake came to light. Is there a good way to avoid this problem?

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