Using Odoo v8:

I tried to use the Journal Voucher method to manually enter a check. Let's say the check amount is $100.00. I credited the Bank account for that amount and debited the appropriate expense accounts.

After posting this journal I was surprised. It did credit the Bank account for $100.00 and debited the expense accounts as I expected. However, there was another balanced entry for more than $100.00, let's say $150.00, credited to Accounts Receivable and the same amount debited to the Bank account.

What am I doing wrong here?