Something strange is happening when you right-align a cell with text that is too long for the cell. To behave like GS and XL, the text should overflow cells to the left (if those cells are empty).
At the moment, instead of right-aligning to the edge of the current cell, the text ends up right-aligned to a cell to the right of the current cell. I use right-aligning a lot. Before GS had an overflow option, the work around was to merge cells before right-aligning. This work around is currently working in SS at the moment.