Theme Changes not reflecting on front end

Yesterday I found that layouts get stretched(full width), many of changes lost and If I do any changes on layouts, styles etc from back end it is not reflecting on front end. Any help appreciated.
Here is the website http://dev.mywpstaff.com/

https://wordpress.org/plugins/timber-library/