At my table it went like this:
Pass-Pass-1♥-Dbl;
2♥-Pass-Pass-3♦;
3♥-4♦-Pass-4♠;
Pass-5♦-All Pass.
Seconds after doubling I realised that 2♥ followed by 4♦ was perhaps a better way to bid this (is the 4♠ bid ambiguous?). Do you agree? What differences might these two auctions indicate?
Thanks,
Justin.

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Pass-Pass-1♥-?