[SOLVED] How to change project planned end date

I got another problem as shown in the screenshot that the second activity should be planned for April whole month with a fixed duration, however, it planed earlier and with shorter duration. I really don't get it. I have deleted all reported work and recalculated several times but nothing changes. Thanks for your patience and kind response!



And another example, you see the work in November was planed in October instead.

Yes, I did.

Which task bar?