SUMMARY
In my checking account, I did reconciliation and I'm also hiding reconciliated transaction (sorry if wrong terms, I use KMM in french). The issue is that I mistakenly marked a transaction as reconciliated way after the last actual reconciliation. This affects the current total of the account, whether we display or not the reconcilated transaction.

STEPS TO REPRODUCE
1. With many transaction
2. Do a reconciliation up to a date
3. Then mark a transaction after that date as reconciliated 

OBSERVED RESULT
total current value of the account is different wheather se display or not the reconcilated transaction

EXPECTED RESULT
Account total should always be accurate and not affected by a display setting

SOFTWARE/OS VERSIONS
Windows: 
macOS: 
(available in the Info Center app, or by running `kinfo` in a terminal window)
Linux/KDE Plasma: 
KDE Plasma Version: 
KDE Frameworks Version: 
Qt Version: 

ADDITIONAL INFORMATION
While I understand the technical implication of this calculation. There are 2 way to see that issue:
1. account total (and each row "up to there total") shouldn't take this setting into consideration, but there are performance implication
2. a transaction shouldn't be possibly marked as reconciled outside a reconciliation, but that's probably a major change in the software.