Website doesn't allow 'Weekend Offer' room booking!

<p>I am attempting to book a room at the Southern Sun Pietermaritzburg hotel for the night of the 14th July 2015 for 2 adults (1 night). Upon entering the criteria, having logged on via my profile profile, there are various room options listed. I have then selected the 'Standard Queen' ' Weekend Offer' of R1,095 incl tax (excl Tourism Levy), but am then presented with the following message: </p> <p><br />"The rooms you have chosen need to be booked separately, as they each require separate payment options." </p> <p><br />Having called the customer care line, I was advised that this rate may no longer be valid. This leads me to ask the following questions:</p> <p>a) How is the rate still available on the website?</p> <p>b) Why can it not be selected?</p> <p> <br />Kindly advise as I would like to book this.</p>