Primavera - compareing a positive schedule to a negative.

Best way to handle the following:  Target (same month) has negative float.  Revision of same month has no negative float (recovery schedule) -  I don't think I can show Target Float, also the Targ. Start and Finish are goofy - I assume that is because they are negative?  -  Seems odd can only pull 1 set of dates.  In P6 16.1 is this a problem they later solved?   Have later versions Added more columns? I think the best way to resolve this is to compare from the Neg. Float version to the non-neg. version.