When ParagraphProperties dialog is opened while several paragraphs are selected, the values in the dialog correspond to the values of that paragraph, where the cursor was placed before opening the dialog. Then if the dialog is closed with OK button, these values are applied to the other paragraphs as well.
Hi, The issue is fixed and will be live with our next LIB release. The fix will be included in our next official 2016 Q1 SP1 release as well. Regards, Aylin, The Telerik Team