Instead of adding button in the header area widget pls try to add the below code in file header.php at line no:87 ie, immediately after the closing of “wrap” div .

Register
Connect

And then include the below custom CSS in Themeoptions and see if it helps –

#button-reg, #button-connect {
    position: relative;
    float: right;
}

Pls style the button according to your needs.

Can you pls provide a link to your site?

Pls ignore the custom CSS which i have suggested before and pls use the following custom CSS in themeoptions –

#button-reg {
    position: absolute;
    top: 10px;
    right: 10px;
}
#button-connect {
    position: absolute;
    top: 10px;
    right: 160px;
}
#header.sticky #site-logo, #header.sticky #primary-menu {
    display: block !important;
}

Did you remove the buttons?
Can you pls add this also in the custom CSS –

#primary-menu {
    float: none;
    margin-right: 20px;
}