There is a style for the connect buttons that forces it on the next line. Find the following in your theme CSS (should be around line 21) and remove it.
div.sclogin-social-connect {
clear:left;
}
Additionally, you will need to float the greeting to the left to get everything to show up next to it. Add
.sclogin .sclogin-greeting{
float:left;
}
Problems trying to align buttons
