The signature issue has now been fixed. In order to attach your signature to a post, you have to scroll down(in the midst of making your post) and click "Options". There should be a drop down list with the options to disable things in your post and yada yada, anyways check the option "Attach signature(signatures can be changed in profile)".
P.S.-It will stay checked(or should) after the first time, so no need to continuously checking it.