If two tabs each have a QListWidget, selecting an item in one changes currentRow() and currentItem() in the other

I had a long description for this report, and my browser crashed.  Also, I notice I've reported a dozen bugs and enhancements, and only two have been fixed.  I think many will graduate to being closed without anything being done; due to lack of activity.  This seems to be how a lot are closed these days.

Here's the short version: Attached is a project made with QtCreator.  It has a QTabWidget with two tabs.  Each tab body has a QListWidget.  If you switch between the tabs, the currentChanged() slot prints currentRow() and currentItem() for each list.  They both start out as -1 for both lists.  If you simply select an item in listWidget, currentRow() and currentItem() unexpectedly change to zero in listWidget_2 - when listWidget_2 hasn't been interacted with.  This is unexpected, counter-intuitive, and required my recoding of my routines.  Also, it was causing a currentChanged() event to fire, where none should have occurred, that was messing me up.

Also, the help should reflect that these values can be -1, and can be set to same.