I end up in the wrong place in the new map Created 1 year ago2023-06-11 17:57:26 UTC by Half

When I try to change the map, I end up in the wrong place in the new map. What am I doing wrong? here are the maps you can look at:https://easyupload.io/m/gcb3r5

Not sure if I trust that site, you could consider uploading it to the Vault instead.
As for your issues with level transition, have you followed any tutorials such as Tutorial: Changing Levels? The entity guide entry for trigger_changelevel is a great resource too.

Also, if you've been testing by launching directly from editor (Jack/Hammer/etc) or simply restarted the map while staying in-game while changes were made, try starting the game anew and not from the editor. Doing that often causes issues with level changes.

I've uploaded the maps to the vault now: https://twhl.info/vault/view/6764

As for everything else I wrote, have you checked those guides and attempted to launch the game normally and boot up the map from there?

Yes I have read it. and loaded the map from the console

First of all, don't Big Box Seal your map, that's bad practice.

Secondly, you have two info_landmark entities sharing the same name in m2. This is the cause for your issue.
It creates a conflict where the transition doesn't know which entity to use.

Give each pair of info_landmark entities an unique name (for example, landmark1 for the m1->m2 transition and landmark2 for the m2 -> m3 transition).