I've heard they can take several months to report, also they are having a lot of financial trouble now, perhaps one of the expenses they are skimping on in the time being is reporting mortgage history to the credit reports.
Free Mortgage Advice & Pre-Approvals (FHA, VA, USDA, Fannie, Freddie, Non-Prime, Construction, Renovation/Rehab, Commercial) since 2002
Located in Southern California and lending in all 50 states