Please see the attached images which shows mixed currencies in a report. All ZAR except one entry from a GBP account.

What is happening is the original GBP amount is being converted into ZAR, however:

The currency symbol shows the account currency £, but the amount has been converted to ZAR.

The error is compounded when summing the items (Total), which decides to treat the entry as GBP and converts it again!

I can't upload images some bizarre error:

The image must be at least 0 pixels wide, 0 pixels high and at most 80 pixels wide and 60 pixels high. The submitted image is 1039 pixels wide and 367 pixels high.

Here's a Google link instead: