Gerard Herard was able to finally purchase a home in 2003 through a $225,070 mortgage from Security Atlantic Mortgage. His payments on the quaint Totowa Avenue house in Paterson were a reasonable $1,300 a month. But Herard's payments have since increased to $2,200 a month and the mortgage has grown, not shrunk, to roughly $300,000. Herard is not entirely sure why his situation changed so dramatically and is struggling to deal with the increase. "I'm trying to climb a steep ladder," said Herard, 53. In recent years, lenders have lured scores of homeowners to untraditional mortgages with changing terms. Many...