Greek yogurt and plain yogurt themes will not display correctly
Thank you in advance,
Here are a couple guides I did that will walk you through:
How to Install a Concrete5 Theme from the Marketplace -http://www.webhostinghub.com/help/learn/concrete5/themes/install-ma...
How to Install a Concrete5 Theme from an external source -http://www.webhostinghub.com/help/learn/concrete5/themes/install-a-...
I hope this helps,