You are holding down the Ctrl key as you move the cursor from photo to
photo. That is what creates the Copy of...

You must take your finger off of the Ctrl key, move the cursor and press the
Ctrl key before you click on each photo.

It's a pain and I have no idea why they programmed it like that.

Carol

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Maybe the following info will help:

It happens occasionally to most anyone who
is trying to multiple select by holding the Ctrl
or Shift key while left clicking to select the
image files.

The copies are created when you fail to
completely release the mouse button before
you move the pointer to another file. If a group
of selected files is dragged...even the slightest
bit...the next mouse click will produce copies
of all the previously highlighted files.

It's somewhat easier if you have your Folder
Options set to Single Click...this way you can
select/deselect a file with just a mouse over
and you don't have to click. For multiples you
still have to hold...Ctrl or Shift.

No click...no drag...no copy...maybe that's
your solution.

If you wish to delete all the files in a folder
you could try the following:

Go to...Edit / Select All...or type...Ctrl / A...

With all files selected...go to...File / Delete...
or press your Delete key...or...right click the
group and choose "Delete".