Hello,

I can’t access site with this username. Please see screenshot.
However, please go to your style.css file and find this line:
.header_8 nav .menu > li > ul.sub-menu, .header_8 nav .menu > li > ul.sub-menu ul{top: 105%; left: 0 !important; }
Edit top: 105%; value to 100% and Remove the left: 0 !important; from it. Save file.
Then add this code into your custom css box:

.header_8 nav .menu > li > ul.sub-menu ul {
    top: 0 !important;
}
nav .menu > li > ul.sub-menu ul {
    width: 180px !important;
}

Result screenshot.
Let us know.

Best regards!

Hello,

i checked your site, but i don’t see the sub-menus overlaying anymore. See screenshot of it. Please clear cache and refresh pages on your computer.

Best regards!