When placing online orders system will pick EUIN of the sub broker assigned to client as per client master first. If that's not available or Sub broker is not assigned then it'll pick from RM if assigned.
If EUIN of RM is also not available then system will pick EUIN entered in the ARN master.
Kindly ensure all Sub broker EUINs are mapped to their respective Sub broker ARN or your own ARN.
Kindly ensure all RM EUINs if entered are mapped to your own ARN.
You can take the Sub broker and RM list in excel from Settings >> User Settings and check the EUINs entered in their profile