If you prefer to manually edit your configuration files, use the following syntax for this option:

#Sort report by accesses
sitesorder accesses
#Sort report by bytes
sitesorder bytes
#Sort report by visits
sitesorder visits

The Chart Top Sites ^(sites) report can be sorted by accesses, or bytes, or visits. Use the Top Sites Report: Sort by ^(sitesorder) option to indicate the sorting order you prefer.