Ah, a fellow TeamRetro siever
Guess I should try to give some answers here! (of course, Mike or anybody else can correct me if I get something wrong)
Non-scoring factors -practically almost all D and E factors- are not displayed it the 2005 stats page, but they are displayed in the all time scores. According to this, you have submitted 2 uniques, 3 duplicate and 115 excluded factors as of 21:00 18 Feb. You should be able to check yourself if this is correct.
I assume it was Mike's choice to not include non-scoring factors in the 2005 scores to avoid unnecessary clutter. I can't give a 100% certain explanation as to why a few D actually score some low points, while others listed as D score zero. Mike?
As for the gaps analysis, it counts all factors submitted in. This means with 120 factors submitted in total for a 500G range, your average yield is one factor every 4,16 G (and the largest gap between two factors in a row can't be THAT much higher than this) which is far lower than the gaps shown in the relevant stats page, so it disappers completely from this page.
Hope this helps and I haven't made any critical errors here