FR Report Problem - Z Not Omitting Zero-Balances and arguments not taking

I've built an FR report. Its very straightforward, I have each individual account listed in column A but grouped together into line items. For example

Column A
ACCOUNT, ACCOUNT, ACCOUNT, ACCOUNT
ACCOUNT, ACCOUNT
ACCOUNT, ACCOUNT, ACCOUNT

ISSUE 1
I put Z in column C but the FR report is not omitting lines with zero balances in the F column.

ISSUE 2
I have a second segment in our accounting system and I'm running only a small range of departments (2nd segment) through the G/L Print Statements window however when the report runs, its still picking up every department even though I specified only a small range in the arguments.

Any help would be appreciated.