Problem when working with template.

I was just working on a template and suddenly this happened. All I did was change the number of columns from 3 to 2 and bang, this happened. See screenshot.

Could you tell me what has happened and how I can get back the template to display correctly so I can continue modifying it.

Hi
do you have a backup of the website or the template ?
I hope that you don't have saved your template after this happened ...
CEd

I do have a website backup.

have you saved the template after this happened ?
if yes than you shall restore from the backup database, look at the #__templateck_templates table to get your previous version of the template

I have had a few issues today, not just Template Creator but PHPMyAdmin playing up too. I tried to restore a backup but then couldn't get into the backend/admin side of Joomla as it kept redirecting to a non-existant installation folder. I Googled the PHPMyAdmin error message, discovered that issue was a browser problem so fixed that which resolved the other issues too.

In the end I restored an entire website backup and from that I also exported the gabarit of the template. I will now do a fresh clean installation of Joomla then import the gabarit.