ProSites -Choose Bottom Block Style for Services Settings Tab not Working

In Pro-Sites/Theme options/Services Settings...

When I set the Services Block mode to post mode and select the category it does not show the latest posts from the category, instead it shows the most recent posts, no matter what category the posts are from,

"if on post mode, it will get latest featured post based on your category choice below with auto image attachment thumbnail."

I addition, what does this mean?

"*default: service mode
if on service mode, you will able to used the custom upload crop image with customize text."

Is there any proper documentation other than the Plugin Usage Page?