Cell Height Changing

Cell Height Changing

When I tab or right arrow to the next cell, the cell height for the row increases in size regularly but not consistantly. The data is well short of filling up the cell, so it shouldn't be causing the cell to wrap.

When I try to manually resize the cell, the gridlines disappear so I can't see when I have the cell the proper size.

When I try to copy the data to another area in the worksheet so that I don't have to resize the row, the data does not copy at all.