I also have been registered as member from August 2013 and I too have the same doubt but no letter received from Institute. But to clear the doubt I send a mail to ICAI seeking clarification on whether I have to comply with the CPE Credit hours in the first year of membership. I got reply from the institute as follows
In first calendar year of getting membership, cpe compliance is not mandatory. Hence, you are exempted in calendar year 2013. Comply cpe guidelines in next block of three years."
I think you too can seek clarification from the institute for the issue by sending a mail
cpehours @ icai.in,
cpedadmin @ icai.in,
cpeadmin @ icai.in