A worksheet is unexpectedly activated

I have a macro assigned to a button that runs perfectly on the data in the active sheet and in other sheets as well using Excel 2010. However, when I try to run it using Excel 2013 or Excel 2016, a different sheet is unexpectedly activated so the macro generates an error. There is nothing in the code that activates this other sheet and, to be safe, the macro disables events, even though there is nothing in the event code that even references to this other sheet. I have tried assigning the active sheet name to a variable at the beginning of the macro and the using that variable to activate the sheet even though it is already the active sheet, but the other sheet is still activated. I was wondering if anyone else has experienced this problem. I was hoping to get some feedback on what could possibly cause this to happen. As I already mentioned, it runs without errors using Excel 2010. My suspicion is that there is a glitch in the 2013 and 2016 versions of Excel. I haven't posted the code because it is quite long and part of a large project that calculates the final results of a cross country meet. If anyone has any suggestions or would like the code to be posted, I can certainly do that. Many thanks in advance.

Also posted at: https://www.mrexcel.com/board/forums...10/post-thread