Selfmade Social Button

Hello together, i have a Problem, again.

This time my Social Facebook Button is messing with me.

I have a Gallerytheme created that i really like and I hardcoded myself some Social Buttons, one of them is the Facebook one.

The code on the Homepage is:
<a class="facebook" href="https://www.facebook.com/sharer.php?u=https://<?php echo $_SERVER["HTTP_HOST"] . $_SERVER["REQUEST_URI"] ?> - <?php bloginfo('name'); ?>" onclick="javascript:window.open(this.href, '', 'menubar=no,toolbar=no,resizable=yes,scrollbars=yes,height=600,width=600');return false;" title="Facebook Like">facebook</a>

Homepage:
The Popup comes, facebook shows up, i get a Pic chosen and then comes the problem i think: “Site not found ? Caylean’s Blog” instead of my normal Site Title.

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The code on the Posting is:
<a class="facebook" href="https://www.facebook.com/sharer.php?u=<?php echo get_permalink(); ?> - <?php echo get_the_title($ID); ?> " onclick="javascript:window.open(this.href, '', 'menubar=no,toolbar=no,resizable=yes,scrollbars=yes,height=600,width=600');return false;" title="Facebook Like">facebook</a>

Posting:
The Popup comes, facebook shows up, i get NO Pic and it still says “Site not found ? Caylean’s Blog”

Does someone has any idea where my problem is?

Kind Regards