Unforyunatly, M.Holm's site have some mistakes
I./ZG2 was formed from Stab, 4 and 6 Staffel of ZG26, with pilots and aircrafts, and kept their Holzschuch emblem. 5./ZG26 was used to form II./NJG4, Rossiwall became its GruKo.
II./ZG2 was formed from remnants of heavy-biten I./ZG26 (I./NJG4), also kept its Ringelpietz emblem.