  The inference of Ying et al. [EPL 104, 67005 (2013)] of a composition-induced
change from c-axis ordered-moment alignment in a collinear A-type
antiferromagnetic (AFM) structure (AFMI) at small x to ab-plane alignment in an
unknown AFM structure (AFMII) at larger x in Ca(1-x)Sr(x)Co(2-y)As(2) with the
body-centered tetragonal ThCr2Si2 structure is confirmed. Our major finding is
an anomalous magnetic behavior in the crossover region 0.2 < x < 0.3 between
these two phases. In this region the magnetic susceptibility versus temperature
chi_ab(T) measured with magnetic fields H applied in the ab plane exhibit
typical AFM behaviors with cusps at the Neel temperatures of about 65 K,
whereas chi_c(T) and the low-temperature isothermal magnetization M_c(H) with H
aligned along the c axis exhibit extremely soft ferromagnetic-like behaviors.
