HTML problem in PostBit Template

[SilverCataclysm]

I modified the postbit template and added a border around any post, but in certain post the left border it's bigger and the background image is repeated.

I'm including some screenshots and my modified post-bit template.

Right - Left Border (http://www.worldfantasy.it/forum/forum-right-leftborder.jpg)
Wrong - Left Border (http://www.worldfantasy.it/forum/forum-wrong-leftborder.jpg)
Some Posts (http://www.worldfantasy.it/forum/forum-extended.jpg)

Thanks in advance :cross-eyed:

[SilverCataclysm]

help me plz!!!

[SilverCataclysm]

up

[SilverCataclysm]

Can anyone help me please? :disappointed: