Business Feature Theme & Membership Plugin Issues

Hello!
I am using the BUSINESS FEATURE THEME & Memebership plug in. I am going to build my site around this theme. I am having a problem and I would like to use this forum as a continued way to ask questions specific to my problem to help keep track. My site is parttimeselling.com

BIG PROBLEM: Site is only appears with firefox on my PC. Chrome and IE on my PC, it loads to a blank white page as well as safari on my iPhone.

First Problem. Top right of the page on the gray tab that says 100% Moneyback Guarantee. Shy of hard coding, can I do anything with this area aside add text to it?

Second. How do I add the log in/log out button for the membership plugin?

More to come, but this is good for now.
thanks!