Dynamic Phase in OrCAD PCB Pro

Hello,

Running OrCAD PCB Designer Pro, 17.2-2016 S050.

Trying to understand Dynamic Phase ... in the image below, which is not a real design - I am attempting to put together an in-house tutorial - the DRC reports "Phase Mismatch G 14.91 Mils".

First question is, what is the 'G'?  On other occasions I have seen different letters, although I cannot reproduce it on this design.

Second issue is the value "14.91 Mils". I used the Show Element function to check the length of each Cline Segment. The accumulated lengths at the end of each of the segments, in mils, are:

Segment      'Top' Trace'     'Bottom' Trace     Delta

   C                   173.94               177.67              -3.73

   D                   215.23               226.42             -11.18

   E                   333.93               345.12              -11.18

   F                   379.05               382.78              -3.73

The Phase Mismatch due to 'C' is 3.73 mils, and the Phase Mismatch due to 'D' is 7.45, hence the accumulated value of 11.18.

At no point does the Phase Mismatch exceed 11.18 mils. But, the sum of the accumulated phase mismatches at 'C' and 'D' is 3.73 + 11.18 = 14.91, the value reported by the DRC. So it seems the DRC is not counting the accumulated phase mismatch for the diff pair. Rather it is adding together the accumulated phase mismatches at each turn.

Is this intended behavior? It seems the goal should be to match the length of the diff pairs and this 'double counting' works counter to the goal..

Thank you for your attention.