Ah! So it was the EV that I was missing. By setting this value I can get the other correct readings and they correspond to the values you guys wrote in the above posts. Good thing I don't have to know the EV table values by heart

Mike Wilde was right though, the meter seems to have lost some of its juice; the exposure time seems to be one mark lower than needed for a correct exposure. I cross-checked it with two different TTL meters from two cameras. It might not be the most accurate test but it shows that it's a bit off.

Thank you fine gentlemen for your replies!