When displaying all activities in one grid, activity view, there is an option to sort on the options set Priority. This sorting is done alphabetically and results in the sorting being:

1. High
2. Low
3. Normal

or

1. Normal
2. Low
3. High

This doesn't make much sense when "sorting on priority". Ideally, there should be an option to sort on the options sets numeric value rather than the label. A quick and easy fix could be to prefix the labels of the options set with numbers eg. 1. High, 2. Normal, 3. Low. This is not possible for developers as the activity table is closed for customization.