@souravsudhi The simplest solution is to post via Windows Live Writer only. Blogger Composer messes up the Source code and adds html tags itself which sometimes distorts the original formatting of your content. This happens mostly when you copy stuff from an external editor like MS office. My advise would be to stick to WLW which is a professional tool to organize quality posts
BTW your post is looking fine now, looks like you fixed it
Rewriting articles wont help unless you remove the unnecessary Div tags or MS office tags inserted inside posts HTML. Normally the fonts used in MS Word causes a CSS conflict issue because the browsers fails to load them and sometimes custom tags inserted by 3rd Part tags confuses the browser and it fails to display the content properly.