Cannot Select And Pull Down Cells To Copy After Applying A Macro

I was messing around with some Macros, as an issue came up where clients were pasting over Data Validated cells (thus removing the validation). Somehow though, the feature where you can select a cell, then pull the active cell down through the column (and then can copy, fill series, etc)has become disabled. I deleted all the macros, and turned them off in the Trust Center, but when I click on a cell the box and plus sign still won't display for me to pull the cell down the column.