Issue in integrating innovastudio live editor option in xenforo editor

I m integrating http://ift.tt/2eB1PQ9 into xenforo editor.

this my xenforo forum

http://ift.tt/2e3fxz3

log in
username : admin pass : 123456

Everything is working fine. Just having 1 issue that whatever styling i m applying, is getting applied to all the text in editor even though i select some part of text from editor.

Can anyone help regarding this?

Thanks