If you are finding that your questions have been removed, it may be a good idea to re-read the site's Community Guidelines. For specific information on why content has been removed, you can also contact Customer Support for additional assistance. Something to keep in mind though, repeatedly asking questions about a similar topic is generally not allowed and can cause your questions to be removed.
Maybe your question was against the Community Guidelines. Sometimes our questions are just silly and don't make since and that's when Ask Moderators come in. :) Go to this link for help: http://asksupport.custhelp.com/app/ask