SISer

Which is better for a solo traveller? I get the feeling Reyno will be too expensive

I've read about the 1A cabins on this forum. I have looked at Carnivals website and when I try to check prices for a 1A cabin for various different cruises, I am quoted double the prices shown. I am changing the number of passengers from 2 to 1 and all the prices double, nothing about a 1A comes up. What am I doing wrong? How can I find these 1A cabins online?

Thanks in advance.