No problem.
To make regsiter button same as login button do following
--------[ To Style Register Button Same As Login ]--------------------------------------------------
1. In qa-styles.css line no #196 (in default stylesheet) or find #qa-register,#qa-login
2. Add register class .qa-nav-user-register .qa-nav-user-link to the #qa-register,#qa-login so finally it should be like this #qa-register,#qa-login,.qa-nav-user-register .qa-nav-user-link
3. In that rule add !important to color:#fff so it will be color:#fff !important;
4. Now add hover and focus rule for register link on line #213 (in default stylesheet). Usually it should below to the point 2 rule or fine #qa-register:hover,#qa-register:focus, #qa-login:hover,#qa-login:focus
5. Add .qa-nav-user-register .qa-nav-user-link:hover,.qa-nav-user-register .qa-nav-user-link:focus to above rule so finally it should be #qa-register:hover,#qa-register:focus, #qa-login:hover,#qa-login:focus,.qa-nav-user-register .qa-nav-user-link:hover,.qa-nav-user-register .qa-nav-user-link:focus
6. In above rule add text-decoration:none; to remove underline from register link when hover
--------[ To Move Facebook Button ]----------------------------------------------------------------
To move facebook button after register, the most easiest way to to float right the facebook button. Use below
1. Find .qa-nav-user-item in qa-styles.css around line #353
2. Below that rule add new rule as below
.qa-nav-user-item.qa-nav-user-facebook-login{
float:right;
}
All done!