This is weird..

One of my member on my forum just messaged me on MyBB forum saying that he sees the postbit style as this..
https://drive.google.com/file/d/0ByAz74Z...dLZkU/view

But i see it normal which is..
http://i.imgur.com/Y09mGAm.png

Can someone tell me if I'm doing something wrong either on template or .css ? If you need anything like my .css or template let me know below please.

Thanks.