PHP or Toolset plugin issue.

History of Problem: 1. Under images, I changed the second and third tabs - "highlights" and "options" - from theme default to display normal html: [login to view URL] ..this was done using 'Toolset' plugin (available through menu), which created custom html fields when I edit the page. 2. Issue one: preview button does not work for those new fields. 3. Issue two: sometimes <p> tags vanish from html field upon updating page. This could just be issue with Toolset plugin setup, not sure.