Thanks for your reply!
The experience letter which my company generated only included job title, salary and date joined. That's why I have asked my current manager to sign off on a letter which mentions job responsibilities.
Regarding the previous job, I did mention that 1 year job experience when I filed PR application, so I am assuming I claimed points for that. If I get the signature from my friend mentioning my previous job responsibilities (but not on a company letterhead) who still works there, any idea if that would work?