1. That is correct. Any ER contribution that would have otherwise been deposited must be offset by the amounts in the "suspense" account. The amounts may not be used to pay fees.
2. These are not forfeitures, even though in most, if not all, r/k systems, the suspense funds are held in the forfeiture account. EPCRS, in this case, does not say the amount is "forfeited." It says "the account balance of an employee who received an Excess Allocation is REDUCED by the Excess Allocation (adjusted for Earnings)." (emphasis, mine)
Forfeitures are unvested funds that leave a participant's account for any of several reasons. The are not unvested funds, they are mistaken funds. So, you do not run afoul of the "no forfeitures to fund safe harbor" rules.