1) How can I limit the number of faces/users on the like box, for now it's infinity and only limited by the height of the box so it lookes as the attaches image.
You can't specify how many faces to show. The Like Box will use whatever height you've specified to show the features you've chosen. If you show a stream, that will take up something like 350px of height. The header will take up like 75px. Then, any additional height from what you've set will be used to show avatars. If you don't want additional to show, either a) decrease the height or b) show the stream to use up more of the space.
2) As for responsive comments, even if I leave the width blank, the dynamic class of FB puts 550px <div id="feedback_08Bs4UUWt43alFcKB" style="width: 550px;">
How can I override it?
Facebook recently changed their Comment module to override our responsive 'fixes' that we were adding. We're looking into how to solve this, but don't have a fix available right now.
3) how can I change the size of like, g+ so they will be with the same size?
The 6.0.3 release of JFBConnect should be out later today or this weekend. It will have a few fixes for the G+ widgets and may fix this issue for you. If not, let us know, and we'll gladly help investigating an sizing issues you have after that update.
I hope that helps,
Alex
like box number of users to show
