Operational question

[Dan Wilson]

Good day all. I am running Excel out of Office365 (updated) on Windows 10. I have two monitors attached to one computer. In creating my weekly podcast, I open Excel on the left monitor and display a list of songs to pick for the week's podcast. On the right monitor, I use explorer to view the entire music library. On the left monitor, I scroll through the list of songs and enter an "x" in a Column which will allow me to sort the chosen music later. After choosing a song and entering the "x", I move the cursor to the right monitor to search for another song. I have to mouse-click the list on the right monitor before it will allow me to scroll. That is not the question. After finding a song that I want, moving the cursor back to the left monitor is the problem. If I mouse-click the list on the left monitor twice in a row with no delay, the cursor will revert to the last cell chosen which may be one or two pages backward. If I add a delay to the second mouse-click, all is well and the new cell is chosen. Is there any explanation for this? It is not an urgent issue, just something that I don't understand. Thanks for any help.