Random question but new to expertlfyer...

i have a booking to johannesburg with qantas in July next year. QF gold at present

MMB shows me in seat 5J
expertflyer showing that seat as available...

(the rest of the seatmap seems to broadly match up with occupied, blocked etc)

what’s going on?!

EDIT: worked it out. Had put date in DDMMYY instead of MMDDYY (duh!)