There is no indication that the homeowners have financial difficulties. It seems that RealtyTrac and Trulia have carelessly smeared them in public.
The mortgage loan apparently was reassigned, as the original lender apparently went out of business.
When that happens, the new bank will assign a new substitute trustee to hold the deed for them. This has no bearing on the homeowners' financial situation or loan status.
As often happens, these amateur real estate sites picked that recording of a new substitute trustee up as a possible default by the homeowners.
Rather than surfing misleading advertising sites, you would do better to engage a real estate professional to help you negotiate the sea of misinformation presented on line.