Prop 8 - Did Mormons Go Too Far?

Activists claim that money from the Mormon Church was the deciding factor in passing Proposition 8 in California - banning gay marriage. The church claims to have only spent a few thousand dollars on the campaign, but ANP has uncovered evidence that may expose a gaping hole in that claim. Also, the IRS forbids religious organizations from "substantially" lobbying for political legislation. Did the Mormon Church violate this law?