pandas dataframe adding extra row on all entries after the 1st

Question

When I add entries to my pandas dataframe, it is doing just as I want it to do for the 1st entry, but after that, it is giving an extra row with only 1 of the entries. It doesn't mater what I put in for the field for that entry, the extra row is always the same.

self.df_DT = self.df_DT.append({self.HeaderHourNumber: self.comboBox_DT_Hourly.currentText(),
                              self.HeaderMainZone: self.comboBox_Main_Zone1.currentText(),
                              self.HeaderDetailedIssue: self.comboBox_Detail_Issue1.currentText(),
                              self.HeaderDTmin: self.line_DT_min.text(),
                              self.HeaderMaintence: self.comboBox_Maint.currentText(),
                              self.HeaderNotes: self.textEdit_DT_Notes.toPlainText()}, ignore_index=True)

self.df_DT = self.df_DT.sort_values(self.HeaderHourNumber)

self.model_DT = PandasModel(self.df_DT)

self.tableView_DT.setModel(self.model_DT)

When I run it, it gives me this:

Hour Number Main Zone  ... Maintence Called?       Notes
                       ...                No            
                       ...                No            
                       ...                No            
      2    Thiele      ...               Yes        some notes
      4    Thiele      ...               Yes        some notes
      6    Thiele      ...               Yes        some notes
      9    Thiele      ...               Yes        some notes

The 'Maintence Called' section is the only section that has anything in the extra rows and it always says 'No'.