Poor information

Good day<br> I travelled to the UK in September 2013 & booked on line. I entered my Skyward miles number and issued my card during check-in. I am now travelling to Barcelona and was logged into my account only to find a big fat Zero! I was not credited for my miles ! I've called and queried and was informed that I needed to log in and then book! Why exactly do they ask for your card at check- in. No way does it state that redemption of travel miles depended on travellers logging into their accounts first!!! What a waste of time and such a deflation for myself.. I've also been informed now that my miles are not guaranteed with my new booking to Barcelona. I've got to log in after my travelling and if I'm not credited , to call the centre again and they will add it on. What a massive waste of time and energy...Am do disappointed ?