Dear Ramakant,
As per the understanding of your situation, i think the management has given consideration to your medical condition and didn't took any action. The purpose of Notice period is to do the knowledge transfer and complete the pending tasks which were assigned to you before you put your papers.
As you were on medical leave from 27 August to 26 Oct 2012 and you had 60 days of leave in your account, so the 2 months absence is adjusted with your leaves.
Taking 1 month notice period in your organization, You had resigned on 3rd Oct 2012 with serving notice period till 2nd Nov 2012. Now your leaves were adjusted till 26th Oct. only and you had not joined back services, so company has asked you to pay them for this time period (6 Days by calculation).
There will be no salary for November month as you didn't worked.