When there are over 8 series in a chart (this is true at least for a pie chart) - Sheets combines all other series above the 8th into "Other" this is really counter productive when there are only 9 series... It could have just shown the last series instead of change the label to "Other".
Anyway, is there any way to stop this behavior manually? The only solution I can think of is doctoring the image and replacing the "Other" with the label of the 9th series.
Edit: This behaviour doesn't happen anymore. No need for answers.