At layout settings, setting the header Row Options, Sticky heading to -> Sticky Top, on scrolling page it sticks on top but the menu and the items hidden on top. I think its a height issue.
epafos Hi I tried the same on fresh installation and it worked fine for me http://prntscr.com/phpcxk Can you Edit fields in first post and submit a temp super user login for staff. This seems some misconfiguration on your site.
Ninja Finally i found the problem. The issue is that if you dont set content in over the header (top bar). the menu scrolls wrong.
I post this for anyone with the same problem. Some how Joomlart SHOULD recalculate if there are item active positions over the header and set the javascript fixed header accordingly.