In some places such as Japan, the reading order is not left to right, but right to left. Yes, every manga is like that, as is every publication made in Japan.

I don't like CLAMP very much, they do this shounen-ai style in their manga, and it getting more and more creepy with time. Rayearth was OK, although I didn't like it very much. Cardcaptor Sakura was a little bit too "cute" and shounen-ai to me. And then I read this "gouhou drugs" manga by CLAMP, and well, uh... it's not my style... in a few years, CLAMP will be messing with Yaoi stuff...