The article points out that the theory is based on perceived anomalies from the expected orbit of other dwarf bodies. The researchers have also not ruled out a

The article points out that the theory is based on perceived anomalies from the expected orbit of other dwarf bodies. The researchers have also not ruled out a few other causes for orbital differences, including capture or being nudged. The good part of all this (aside the poorly worded space.com headline) is that now the wonky orbit has been identified, it should be easier to correlate it (or not) to other bodies with further study.