Some stuffs looks different on other computer

Looks like this CSS – the negative margin:

.onoodor {
    box-shadow: 0 0 9px -6px #C50707;
    float: right;
    height: 262px;
    margin: -280px -220px 0 0;
    overflow-y: scroll;
    padding: 14px;
    width: 164px;
}

You also have a whole lot of mark-up errors that may be causing problems in some browsers:

http://validator.w3.org/check?uri=http%3A%2F%2Fholboo.mn%2F&charset=%28detect+automatically%29&doctype=Inline&group=0

You may want to check with the developers of your theme for additional help – as these forums only support themes from here:

http://wordpress.org/themes/

Are you developing for all computers, browsers and all devices?

Then first thing you should do is resolve your validation errors.