Ubuntu 14.04 Skrooge 1.12.5 KDE 4.13.3
Before explaining in detail, is there a known issue on migration from 1.08 where the first operation in a scheduled transfer is given an apparently random date and is therefore unaligned. The operation does not appear in the list of transactions for the account at that date but it does feature in reports. I processed the next scheduled operation and the same behaviour was observed. TIA and sorry if this has already been covered many times.

On your version of Skrooge, a suboperation can have a date not equal to the date of its operation.
This is mainly used to split an operation in 3 monthly payments for example.

Your issue could be due to that.
To check, you can used the "Advice" widget on the dashboard.
You should have an advice informing you that you have not align dates for single operation and an automatic correction proposed.

Sorry Stephane, my original reply was lost in the login time-out. I know this is an old version that is not being developed now, so I don't want to divert your attention. There has been a change of behaviour between 1.08 and 1.12 which leads to data corruption with scheduled transactions. If I cannot work around, I will revert to the previous version. Keep up the good work. Skrooge is a testament to the skill and dedication of you and the team. Salut et veuillez recevoir mes remerciements comme toujours.