The IRS approved Bank of America’s $8.5 billion settlement involving vintage non-agency mortgage-backed securities this week. The approval paves the way for investors to receive funds from a settlement that was announced in 2011. Mortgages play a role in a dispute between a former internal auditor at BofI Holding and the bank. Matt Erhart, the former auditor, filed a federal lawsuit this week with a wide range of allegations, including that BofI ... [Includes two briefs]