Entries are getting parked under one particular account. Eg:If purchase entry passed in party "A" the payable balance appearing in party "B", this happens for all entry

Hello there, aruns. 

When creating a Bill, the system uses the Accounts Payable account as the credit while it debits to the affected account under the Category details in the Bill window. We can verify that by going into the transaction history. 

Here's how:

1. Open the Bill.
2. At the bottom, click More. 
3. Select Transaction journal.

You can check out these articles that will help you manage your vendor transactions:

• Customise reports in QuickBooks Online
• Enter, edit, or delete expenses in QuickBooks Online

Keep me posted if you need more help. Take care!