[Nowhere in any of that will you find a "D", "Dem", "Democrat", "Democratic" or any variation thereof next to Mallott's name.]
Nowhere does it mention the Lt. Gov. candidate's party at all.  That doesn't change Mallot's party affiliation only that it wasn't reported.  You're arguing from ignorance in the face of direct evidence that is on point and states to the otherwise.  Here's some more evidence to the otherwise: wikipedia lists him as a Democrat.  Unless you have information of him changing his party affiliation then he still remains a Democrat.
[you and I both know that as a practical matter, such an arrangement would have made the ticket less attractive to marginal voters.]
If it weren't for the fact that the Unity ticket was created specifically because neither candidate had enough votes independently to beat Parnell I might agree with you but this was not the typical ticket on the vote for governor.