"Before moving on to more revealing nuggets in the candidate's tax filings, there is one caveat. Some of their tax returns are only partially disclosed. So we can look only at the parts made public and wonder about the rest."

"The good news is, these candidates agreed to disclose at least a portion of their federal tax returns. The bad news is, none of the partial returns give a complete money picture."
Also, you have to remember you are talking about ADJUSTED gross incomes.
However "Kudos" to you for at least referencing your findings and keeping yourself informed!