Re: Altium Designer: Disable auto-removal of redundant trace
Your redundant traces are being removed by "loop removal". You can turn off loop removal for individual nets by using the PCB Panel. Set the panel to display "nets", highlight the net you want, right click, choose "Loop Removal", and turn it off.
You can also right click on a track or via, select "Net Actions>Properties", and uncheck the box for "Remove Loops".
Finally, while interactively (manually) routing a track with a net assignment, you can hit "tab" to bring up the properties, and uncheck the box for "automatically remove loops".