Remove blank spaces (empty module positions)?

Hi! On my site there are a few module positions unused. The template seems to put an empty white space there instead of just not showing those positions.
Could anyone give me a hint how I can remove that? Google didnt turn up anything. See image attached.

There are two blank unused spaces at the bottom of the page.

jagd-altoetting.de/index.php/vorstandschaft

Thank you in advance!

hi there,
1.) White Space is an html code error, please look to your main-top modules and fix the double code
2.) White Space is the Joomla System Output. You can disable the system output at Template Details > Systemoutput = OFF

Thank you!

I deactivated all modules on that page, this made some blank spaces go away but not all (one stayed).

When I deactivate system output the same happens: Most go away, but one blank space is left.

I can give you admin access if that helps. Im out of my depth here, I am afraid.
I have already thought of using another template. However, I like your templates and would like to continue using them.

Send me Admin access data via SSL secure mail form:
www.joomlaplates.com/contact-us