Best offer cancelled before expiry date

[mikgardne14]

My best offer for £20 was cancelled by ebay when a lower bid came in at £15, this was before the best offer expiry time.  Is this common place or just a feature of the ebay software

[john1297576]

Auction with best offer is treated exactly the same as auction with BIN.

Best offer or BIN is only available until a bid is placed, then bidding takes over.