I betcha WMIIC banked its certificate income with its WMI consolidated affiliate bank, WMB.
WHY WOULD THEY BANK WITH ANYBODY ELSE BUT THEMSELVES?
WMIIC's (the 1st BK filer) assets, were protected from WMI (whose BK was filed 2nd), AND from the FDIC, who had no right to keep anything that belonged to WMI the holding company.