Strange bug in Zoho Books.... Can't refund Vendor Credit of a bill to same account which I paid the bill from?

Strange bug in Zoho Books.... Can't refund Vendor Credit of a bill to same account which I paid the bill from?

Two screenshots below says it all 

I paid a bill with paid 211.4 through "Ebay Receivables" account (Account type: Payment clearing) as shown below  image or attached image ZohoBillPayment.gif ... ....







But after some days when I created Vendor Credit of same bill and tried to refund 76.63 it doesn't show the account "Ebay Receivables" which I used to pay the bill....
See image below or attached image ZohoVendorCreditRefund.gif ...





It is a very simple logic....

When we are paying our bills through an account "Ebay Receivables" .... then Vendor credit to the same bill should get the refunds back to same "Ebay Receivables" ....
But while creating vendor credit when I choose refund , I see all my bank accounts but NOT the account which I used to pay that bill for which the vendor credit is created that is the "Ebay Receivables" ...

Is it a bug in Zoho books or what?????