Weird Error

The category name is displayed just like a normal H1 text as defined in your template CSS.
If you want to display it differently you will need to add/change the CSS. If you want to center it, you can use that CSS:
.hikashop_products_listing_main h1{ text-align:center !important; }

For the weird error, I actually don't see it from here. That's the place where you have the facebook iframe. So apparently there is something which blocks facebook on your end.