Hatches printing over lines... but why?

I understand if a hatch of a lighter line weight is printing over lines of a heavier line weight, the Print Driver is most likely the culprit here. But why does this strategy work? It's a long explanation, but for the few Saints who can give an explanation, I'd be eternally grateful. Here it is...

1)In the offending sheet open an xref for editing in place.

2)Grab the offending hatch and send it to the back. My preferred way is to select the hatch then right click. In the menu that pops up highlight “draw order”, then in the sub menu select “send to back”.

3)This part is especially dumbfounding: you DO NOT need to save the xref you just edited. To escape your editing session without saving, look for the toolbox that has the little red “x” over a piece of paper. This toolbox is probably floating conspicuously in the upper left area of your drawing window unless you stuck it somewhere else. Click that red “x” symbol. CAD will warn you that you are about to discard all changes to the drawing file. Tell it this is OK.

4)Presto! Your offending hatches should be banished to the back, whence they belong. You can now print and make PDFs (including using batch convert in view companion pro) with no grey hatches ruining your good time.

..OK so why don't you have to save? ... AND is this a permanent solution?

Where did you get these instructions?

Please give credit to the author when quoting their work.

I don't have Autocad on this computer, so I can't test this, but I have no idea why you wouldn't save your changes. Have you tried it with saving and without? Does it make a difference?

This was a solution discovered by a friend and coworker. I didn't realize threads here might be subject to proprietary gains and offered it as a mystery to my fellow CAD-ers. This program gets more mysterious with every addition and as a Super Moderator, Cad64, I am sure you can attest.

Saving did solve the print issue, but caused other errors as well and was discarded as a solution. The mystery is: "How can editing an xref's layer position (to the front or back) in a sheet file, but not saving this change, still be essentially remembered by the program.

Personally, I'm a fan of upgrading our print driver... but Management...

later.