Yes, the correct reported ordering here should be “Unknown.”
Clearly the material is magnetic given that the total magnetization is positive, but this specific calculation did not have site-projected magnetic moments, so we do not have enough information to say whether it is ferromagnetic, ferrimagnetic, etc. (it would probably be reasonable to assume in this case that it’s actually ferromagnetic, but we can’t prove that algorithmically).
For anyone unfamiliar with the kind of DFT calculations that the Materials Project does, the net magnetization of any one given spin-polarized calculation is unambiguous and known exactly from the output of the calculation, but assigning a magnetic moment on a per-site (per-atom) basis is not an exact science and is an additional step, and has historically omitted from certain types of calculations we perform.
Since we did not have site-projected magnetic moments for this calculation, the ordering was incorrectly labelled as “non-magnetic” since the ordering analysis is done on the structure, did not find a structure annotated with magnetic moments, and therefore concluded it was not magnetic.
(Also thanks @shyamd for investigating!)