The Invite module can be complex and tricky. There's an auto-resizing option in the parameters which will hopefully fix your issue. Please enable that and see if it fixes your problem. For more information on that and other settings to check, please read this tip:
www.sourcecoast.com/extensions/jfbconnec...questions#jfbcinvite
A longer discussion about the Invite module was also just had in the following forum thread, which you may be able to get some ideas on how to fix your issue in. If not, feel free to let us know (after you've enabled auto-resizing), and we'll see what we can do to help:
www.sourcecoast.com/forums/topic?id=1780
As for the JFBContent plugin, please also enable the JFBCSocial plugin. That's what translates that text into the proper Facebook widget. It's confusing, and we'll be improving all the addons that need to be enabled in the next release. Sorry for the confusion.
Hope this all helps, but as always, let us know if you have any other questions or need more help with any of the above.
Thanks!