I am having an issue with autofill in Excel 2016.
When I use autofill, a reference in the first/initial formula changes unexpectedly (see "Excel autofill issue" gif link above). The reference to "AA4" should remain in the first formula and should autofill to "AA5" in row 5, "AA6" in row 6, etc.
Calculation setting is on automatic.
For the life of me, I don't understand why Excel changes the "AA4" reference in the first row. Is this expected behavior or is this a bug?
