You did apt-get autoremove? It will surely remove the meta package then! What you need to do is post the output of Code: apt-get install twitter --reinstall The above will show what has been stopping it from being installed. Also if you have played around with /var/lib/dpkg/status then surely you have now made proper edits there...
apt-get install twitter --reinstall
And I would suggest against removing mp-harmattan-001-pr, or at the first occasion you will remove a package, there is a good possibility that you will see most of the packages disappear one by one...