Adding an image to a draft blog using the media tab, and then fine tuning with the editor allows me to set the alignment (left) and size of the image (30%) and margins (25 right) in an identical manner as a Joomla article. Everything looks good in the editor (see screen shot).

However when previewing the draft from the dashboard, the image is centered and surrounded by a border - second screenshot.

What is happening here?

Assistance much appreciated!
Andrew

Articl is written by author Jeannette Gagan; title "Male or female...etc"