They are two different servers. If you don't let the PTS finish downloading its going to keep trying until you do
ZOS_TristanK wrote: »Hey there, @basketball_rickyb16_ESO. Uninstalling PTS will stop it from attempting to download, as others here have mentioned. However, if you would like to keep PTS installed on your computer without it automatically updating, it's just a quick settings change.
First, please make sure that the PTS client is showing on the left side of your launcher. Select the PTS client so that it is highlighted. Next click on the "Game Options" dropdown under the "News" section of the launcher. Click on "Settings". The first option in the settings menu allows you to configure the Auto Update feature. If you set "Auto Update" to "Never", it will no longer try to download every time you open your launcher. Hope this helps!