Previous meter reading nothing like new reading. 2 mpan numbers

I’ve just joined bulb and they have asked for my first reading but the 'previous ’ reading I see on the website is nothing like the reading I can see. I have 2 mpan. I have a meter with a keypad but have pressed both 9 and 6 as per the bulb help. I’m lost as to what to do. Any ideas please? Thanks in advance