iKLutzSupreme wrote:
... there are at least three other columns (genre, year, size) that cannot be seen because the horizontal(bottom) scroll bar is awol in device view.
But iTunes is effectively saying that there is not. Have you checked that those columns are selected, because as of your reply, you have not confirmed that you have?
Again, this started only on this new laptop. The bottom scroll bar did not awol on my old laptop or desktop.
Doesn't matter, it's what's happening now, in this iTunes Library, that counts. As explained, each view is independent.
Right-clicking on the field headers and doing "auto resize" does nothing for me.
I didn't suggest that you try auto-size, with very good reason. If the display is already at optimum size, then Auto-size does nothing. If there are no additional columns to show, then Auto-size will not change anything. If you tapped Auto Size Column, rather than Auto Size All Columns it may have no effect.
On what do you base your assertion that there are additional columns to be displayed? Since you have tapped Auto-size, it means that you did open the context menu with the list of all headers. So, were the additional columns that you mention (genre, year and size) ticked (checked)? If they were not, then they will not be shown.

In my selection, notice that Size is not selected. What does your selection look like when you open the context menu in the phone view?
You could have tried the test I laid out in much shorter time than it took you to type your reply to me. Currently, I have no confirmation from you that you did try it or what happened when you did.
You asked a question in your initial follow-up; Am I the only participant here with these seeming incomprehensible issues? Until we go through the steps I have put forward, there is no evidence that there is a bug in iTunes that is causing this issue, so the answer to your question is currently yes.