I've just spent the best part of an hour trying to understand why my bank statement and account don't balance and it would appear that iCompta can't add up!!!
£2,634.38 + £84.75 = £2719.13
I've checked the percentages and the transaction is at 100%, I've deleted and added the transaction again and it still the same!
The preview column is based on the "reconciled date" and not the "date" so you have to sort by "reconciled date" for the preview column to show in the right order.
If you are in detailed view, you have to switch to the standard view first, then change the sort order by clicking on the table column you want and then switch back to the detailed view.