HELP: Incorrect date after Import > Rebuilt > Sync

On nov. 13th, After IMPORTING mailbox that was export from mac Mail in .mbox format, I have:

1. Rebuilt
2. Syncronize

SMTP account.

RESULTS:

All these import email have the date of nov 13th.

Dates are incorrect. These is what I have done after when the issue was notify:

1. Rebuilt again the mailbox
2. Syncronize again the mailbox
3. From Time Machine, restore the complete folder: MAIL from Library (Library>Mail)
4. Clean install of macOS High Sierra (Command-R)

Issue persist!

All imported email have the date of nov. 13th 2017.

Any solutions?

HELP!