Sorry, I don't get alerts when people respond to my posts, so am just checking and saw these.
Yes, Spill does nothing but cause problems for me. As an auditor, I have to add a Index tab to my clients' workbooks then add workpaper references (such as "A1", "A2", etc.) in all the client's tabs. I then link those references to my Index tab, and then put the Tab Names and other relevant info in the columns to the right.
Thanks to this stupid Spill thing, i'm constantly getting Spill errors when Ido this now, even though I make sure the cell I add my workpaper references in are not adjacent to populated cells. No one can tell me how to turn off / disable or otherwise work around this spill "function". All of Microsoft's changes in the last 10 years have been worthless, but this is one of the first that actually makes Excel more difficult to use.