Maybe the software shows the available icon if there is a single seat on any flight (even if you are searching for 2)? That matches the behaviour that I've noticed in the past, and is the reasonable way to implement this function (some people would want to see availability even if it isn't for all seats in the party). QF often puts canceled awards into revenue inventory (part of the reason why primo awards are so scarce -- they are booked 12 months in advance and then canceled closer to the travel date, but stop being award inventory) and then releases awards 1 seat at a time. So if someone cancels 4 award seats, these will trickle back 1 at a time over a several week period, instead of as a block of 4. Making it much easier to get a single award seat than multiples. I have no inside knowledge about how QF and QFF work, but have noticed this behaviour over the years and it is too distinct to be coincidental.