Document splitting and substitution rule

Hi,

we have doc splitting activated and we also have a substitution rule for a customer recon account to populate partner profit center based on the account and the segment. But this substitution rule is not working only for this customer recon account. I tested all the other accounts from that same set and the rule is working for them.

Did anybody experienced similar situation?do I have to change any document splitting rules to make substitution rule kicked off? Please advise