Applying for Membership with part of Gold Approval

Hi,

I have a question with regards to registering to become an ACCA member. basically I did 36 months and half my objectives at a platinum employer and get the objectives that I achieved signed off on a sign off sheet. When I went to my new company, they were not gold or platinum approved but got my manager to become my mentor as he was ACCA qualified and we completed the remaining objectives via paper sign off. I logged all of this on myACCA and it seems fine. I am just looking to know when filling out the membership form, how do you say you have half objectives from Platium employer and the rest from non platinum employer as you either sign off for platinum approval or you don’t. Additionally do I have to get someone in my current place of work like external auditor or partner to sign me off or is it sufficient that my ACCA qualified mentor has signed off my objectives and I have gain my time experience and remaining objectives at platinum employer.

thanks
thomas