dropcap problem

Hello
thanks for the best plugin for drop cap.

I’ve got one problem: in some posts initial letter is covering next paragraph.

Look:
There everything is okay: http://www.lichquinn.pl/Lich/zazdrosny/
There isn’t: http://www.lichquinn.pl/Quinn/dr-oetker/

additionally i can’t edin plugin settings. When I try to edit dropcaps.css or other css file in this plugin, nothing is happen. I tried to uncheck discussed in readme option in plugin options, and there is no results.

Please help me

https://wordpress.org/plugins/drop-caps/