The EXOEarths team (Centro de Astrofísica da Universidade do Porto - CAUP), in collaboration with Geneva University, did a joint analysis of data from the HARPS spectrograph and the Kepler satellite. This analysis revealed that the orbits of other planetary systems are aligned, like in a disk, just like in our own Solar System.
It would be far stranger if the configuration of the solar system was a cosmological anomaly. To read more, click here.