the simpliest answer is: if you create a company named as "Player" ofc the company will be named "Player Transport" (or town name of first action when Player Transport is already taken). The "auto-login" is performed accordingly info the server controller had on you before the restart, even when joining with another nick or no nick at all (Player). You can, from the start, set your nickname on the Multiplayer lobby:
or, when already logged in, change it later with !name *** command, in case you join with any other nickname that not the registered one. So, my suggestion is: don't create a company when named as "Player" because, as said, company will be named "Player Transport". You can change that info later AND before claim a town, in the Company window:
...but my suggestion is to create a company already with the nick you want to be used ^^
Hope it helps