Bug: Incorrect storage of transactions

[DiMan]

Originally, I opened this ticket for an export error of QIF files. After further analysis, I found out that the data in the program is stored incorrectly in some situations. Here is the description of the error.
(Similar tickets are #723 and #726)

Steps to reproduce the behaviour

1. Set "Default Transaction Type" to "CREDIT" (under "Settings" > "Transactions" > "Default Transaction Type")

2. Create new transaction from Account "Assets:Current Assets:Cash in Wallet"
   Description = "Test 1"
   Amount = "0.01"
   Direction "Spend" (set automatically)
   Account "Expenses:Auto"

3. Save transaction

4. Check the total amount for Account "Cash in Wallet" = -0.01 (🆗)

5. Create new transaction from Account "Assets:Current Assets:Cash in Wallet"
   Description = "Test 2"
   Amount = "0.02"
   Direction "Spend" (set automatically)
   Account "Assets:Current Assets:Saving Account"

6. Save transaction

7. Now you see two transactions in Account "Cash in Wallet": -0.02€ and -0.01€.

8. Check the total amount for Account "Cash in Wallet" = -0.03€ (🆗)

9. Now change the Account in the transaction "Test 2"
   Change Account: "Assets:Current Assets:Cash in Wallet" => "Expenses:Auto"

10. Save transaction

11. You still see two transactions in Account "Cash in Wallet": -0.02€ and -0.01€. (🆗)

12. If you check the total amount for Account "Cash in Wallet", you will see +0.01€! (✘).

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Export transactions to QIF or XML

When exporting the transactions as QIF or XML file, you can see that the data was stored incorrectly:
See row No. 15:

The transaction was stored with a double minus. See row No. 1495 und 1496.

Here are the files:
QIF and XML Files.zip

Software specifications

• GnuCash Android version: 2.2.1
• System Android version: 6.0.1 (german)

[rivaldi8]

This is the same issue as #723, for which the fix will appear in the next release.