Hi sokratis,
About Fullwidth, in this issue, you have to use the content directly outside of the Hoskia Section element. Because the Hoskia Section element has built with the container.
Moreover, you have selected 4 column and it works. Example: Pricing features column + 3 Pricing Tables. However, we have found an issue about the Pricing features alignment. We have listed this in our theme update list.
Furthermore, we didn’t find any issue like your last screenshot in our WHMCS template. Please check out here http://billing.ywhmcs.com/clientarea.php?systpl=Hoskia
Best Regards,
ThemeLooks Support Team