By default, DITA2Go wraps each non-inline graphic in paragraph tags. If you are replacing graphics with macro code (see §32.4.2 Replacing or surrounding a graphic with macro code) or repositioning graphics in HTML or XML output, you might need to eliminate the enclosing paragraph tags.
To omit paragraph tags around graphics:
[Graphics] ; GraphWrapPara = Yes (default, wrap graphics that are not inline in ; paragraph tags) or No (eliminate wrapping tags) GraphWrapPara = No