I have noticed, that lately, the AY miles calculator has a life/mind of its own.
Doing a multi segment miles calc, will give 4'000 miles for e.g. ZRH-HEL in AY J but zero miles for the return flight (also AY J).
Did another few checks on upcoming flights, with MH (booking class Z) and CX (as AY Code share so using Business option) and here as well, hit or miss giving miles one way but not so much the other...