BACKGROUND
I use Zoho One with CRM - Books - Expense integration. 

I have several contractors(Vendors) that provide services for my Deals/Potentials. The cost of the services are accrued for approximately one month, and then the Vendor invoices me for payment.  

I can add these accrued services as Expenses from Zoho CRM and associate them with the Clients - Deals/Potentials. 

I can also add these accrued services as Expenses in Zoho Books and associate it with a Client and Potential/Deal.  

Once I receive the invoice/bill from the Vendor, and I am ready to pay in Zoho Books, I can create the Vendor payment from the bank account page, and there are 2 issues:
1. Since there is not a Bill in Zoho Books for that Vendor, the amount creates an Excess Payment for that Vendor.
2. There is no way to associate the Expenses with the Vendor Payment. So it is not obvious if that Expense has been paid without additional excess manual steps. 

If I create the Bill in Zoho Books to avoid the Excess Payment for the Vendor, there is no apparent way to associate the Expenses with the Bill, nor is there any way to associate the Bill with a Potential/Deal, only the client. 

It seems like the current system will double record the payments to Vendors, and has MANY opportunities for errors.