Bank statement file control total incorrect

Currently we use a propietary bank statement file.  This is a monthly file but we are transitioning to a daily file using a industry standard format, re:  BAI2.

We are testing the BAI2 version of the file in order to move away from the propietary file which has some limitations such as a limited amount field size.  The bank, Wells Fargo, already admits that their BAI2 file is not fully BAI2-compliant.  They do not give us an opening ledger balance.  We've worked around this, by getting the previous day's closing ledger balance and using it as the next day's opening ledger balance.