Is it right in the eyes of God for an Elder to backslide, cheat, drink and party out in the world then able to come back into the pulpit in just a couple of weeks after repentance?
No! and it would be questionable if one should ever be allowed to return as a teacher. Romans and Galatians describe the seriousness of the sins you listed: Rom 13:12-14 … let us therefore cast off the works of darkness, and let us put [...]