I believe the issue is that the display of fare perks (luggage, seat selection, rebooking, refund) is just a mess on the website that you cannot fully trust. often it does not show SkyPriority perks even though I am logged in as platinum member, there are issues regarding the display of flexibility so weird that even flex fares are supposed to be not rebookable according to the booking engine.
the only reliable source is your e-ticket. whatever is printed on the e-ticket should reflect your allowance correctly.