99.9% of the time moving worksheets will not cuase you any kind of issue. The
only time I can think of that it would couse a problem is if you have a
formula something like this
=Sum(Sheet1:Sheet3!A1)
Which adds up all of the values in cells A1 for the sheets physically
between (and including) Sheet1 through Sheet3
If your sheets tabs are ordered Sheet1, Sheet2, Sheet3 then all of those
sheets are included in the calculation. If you move Sheet2 ahead of sheet1
then it is no longer included.