why is this happening?

well i don’t know why but since i put “more tag” on the top post, the rest of the posts (only on the first page) has moved to the left, it looks dumb

http://www.farsouth.wz.cz/

see under the “Nokia BMX Worlds 2005” it just moved…
now i’d be glad if anyone could help me, i guess i need to delete some tag or sth in html code but i don’t know what and i’m afraid that i would just make it worse

thanks