Where are sunspots generated?

The data from the Greenwich Observatory for 1879-2003 (cycles 12-23) have been used to plot a time (Carrington rotations) vs. Carrington longitude diagram of distribution of the rotation-summed daily areas for each sunspot group. It has been revealed that most of the sunspots appear as clusters having common sources (Sunspot Formation Zones) that lie on a surface rotating with a period close to the Carrington rotation period T=27.2753 days. At the same time both the active longitudes and medium-size spots shift in the Carrington heliolongitude and rotate at an angular velocity corresponding to the rotation period Tsim26.8-26.9 days. An attempt is made to explain contradictory data on the character of rotation of sunspots and active longitudes.