email folders

[3PUTT3]

I use AT&T Yahoo email and what has been happening is that I have created several folders for various emails. The problem occurs when I move the emails to a specific folder and then come back to it to mark those for deletion, those that I marked become unmarked when one of two boxes pop up on screen. they say : back, forward, reload, etc. and a "create QR code for this page". This annoying box pops up in Google, Yahoo, Facebook and others. Is their an explanation for this? Appreciate your help. 

[itsmyname]

@3PUTT3 -- back, forward, reload, etc. and a "create QR code for this page". 

Exactly where on the window are you clicking, with the RIGHT-side mouse-button, to open this pop-up?

Do you have a notebook computer with a touchpad? Are you accidentally touching (maybe with the palm of your hand) the right-hand half of the touchpad, to simulate a "right-mouse-button-click" ?

Also, note that a "move" is actually both a "copy" and a "remove original".  So, if you really are using "move", you should not need to "delete original".