Adding a paypal button on a page

I have added a few PayPal buttons via the “Insert HTML Snippet” widget.

The “Subscribe” button drop down menu gets overridden by the hb-themes drop down, and it will not let me center the button.

The “Donate” button will not center either.

The “Unsubscribe” will center.

Is there a way to get these elements to act according to formatting?

Is there a way I can remove the special drop down menu styling?

HERE is the page with the content.