I've noticed this bug in IB WebTrader...sometimes when changing contracts, the dialog will get populated with quotes from a previous contract that I was looking at...in the case below, the HAL 48 Nov call quotes applied to XBI order entry: I've also noticed this when switching option chains. I can click the CHK tab and see quotes from FB option chain. Yes, I'd love to sell a November CHK 133 call for $4. I'm using Google Chrome.