How to align versions in roadmap and changelog.

[JR10]

I want to align versions in roadmap and change log, like first version then second version under it.
How to do that?

Also, I haven't set any release date, and it shows "(Scheduled For Release 1970-01-01)".
How to remove it?

[atrol]

I want to align versions in roadmap and change log, like first version then second version under it.
How to do that?

There is no customization option for this, so you would have to change the source code

Also, I haven't set any release date, and it shows "(Scheduled For Release 1970-01-01)".

This is a known bug http://www.mantisbt.org/bugs/view.php?id=12409
For workarounds see the additional information of the issue.

There is no option like the one for roadmap ($g_show_roadmap_dates = OFF;) for changelog.
You should enter a feature request at http://www.mantisbt.org/bugs if you want to get something like $g_show_changelog_dates = OFF; in future versions of MantisBT