RE: Invoicing

I have a tenant that has 9 units.   1 is in cc the other 8 are outdoor standard units.  I'm having an issue with the invoicing showing all the units on 1 invoice.  For some reason it is sending the climate control unit invoice seperate from the other 8 units.  The tenant keeps requesting that the invoice show all 9 units and I can't see to figure out why it is excluding the climate control unit and sending a seperate invoice.  All units are due on the 1st of the month, they are all set up with invoicing 10 days prior.  So in sitelink is there a limit to the number of units included in an invoice or is this just some weird glitz?