Hey, I changed the font to Trebuchet MS under system fonts, in google chrome it looks fine but in firefox its times new roman.. What can I do to fix?

I have set the font to trebuchet but I could not see any issue in Firefox.
Maybe its a redering issue with Firefox

I notice that if I set the font type in the article it works but the headings still do not show up as the selected font in the template options..

Also, in some browsers there are 2 logos, than in some there is one..

Ive been looking for a reason for this, still looking but maybe you can help?

Please check where your logos are published.
The Template has 2 module positions for logo.
1.) logo
2.) logo-small

They are both published in their respective places. The normal logo is published in the normal logo module position and the mobile logo is published in the logo small position..

The logo small is still showing up on certain normal browsers. and than the mobile logo is showing up outside the top grey bar in some mobile browsers..