I'm doing some searches in the GNT-T concerning the differences between some textes. Starting with the search "*" I get all words in a previous specified range. When I now look to the Chart Analysis in the detail window and set the choice to "case" I expect a chart with the classical cases, i.e. nominative, dative , ... Searching in the Letter to Hebrews I don't see the genitive case. Instead there's one case which is labeled "(+dative)" (see attached picture). Searching in the whole NT, the dative case is missing and a category "(+accusative)" appears.
I'm wondering where the "missing cases" are and what this dubios "(+" means. I would be very happy if someone could help me with this.