If a cell is aligned to the right, but the text does not fit in the cell will overflow into the right cell. The behavior I would expect (as seen in Excel) would be for the overflow to occur to the left when the cell is right justified.
Furthermore, if a cell was centered it should overflow to both the left and right (as Excel).
I have attached an example that demonstrates this issue in which you will see that the text in row 4 aligns to B, but when show issue is pressed it aligns to D. Center (row 3) has a similar issue.
It may be easiest to demonstrate with excel and sf side by side to show the differences in overflow using different horizontal alignments.
colwidthissue_5861.zip
Thanks,
Steve
P.S. I assume this would be an issue for languages that read right to left as well.