SVG (Trend Chart) Dotted Lines

Question

hi
i have two below mentioned trend (Line) charts ChartA & ChartB and both charts have same settings but the problem is only ChartB Chart is showing interconnecting line on canvas while ChartA showing only dotted points and i am not been able to understand, why its showing only dotted points because all the chart have same properties instead of query's where clause.
and if i copy the ChartB chart query to ChartA chart then ChartA is also displaying the interconnecting lines on canvas.
could you please explain what i need to do to resolve this problem.
This is happening in HTMLDB 2.0 version.
    both the charts has below specified settings :-
    Chart Setting:
    Chart width 600 Chart height 400
    Chart title: null
    Legend background color: null
    show legend (unchecked)
    Y axis min: 0 Y axis Max: 100
    Series attributes
    Marker style: Circle Marker size: 3 pts
    Line Style: Dottted 3 Line weight: 2
    data labels: Show value (checked)
    Data label format: Null
    Data label orientation: Null degrees
    Maximum rows: 15
chart queries and resultset:   
--ChartA -prject a and b trend
SELECT   NULL LINK, TO_CHAR (identified_date, 'YY/MM') label,
         COUNT (issue_id) VALUE
    FROM ht_issues
   WHERE related_project IN (140, 180)
GROUP BY TO_CHAR (identified_date, 'YY/MM');
LINK     LABEL     VALUE
     06/11     1
     06/12     1
     07/02     1
     07/03     1
     07/04     6
     07/05     1
     07/06     1
     07/07     1
     07/08     2
     07/09     6
     07/10     5
     07/11     5
     07/12     4
--ChartB -prject c and d trend
SELECT   NULL LINK, TO_CHAR (identified_date, 'YY/MM') label,
         COUNT (issue_id) VALUE
    FROM ht_issues
   WHERE related_project IN (80, 101, 81)
GROUP BY TO_CHAR (identified_date, 'YY/MM');
LINK     LABEL     VALUE
     06/08     3
     06/09     2
     06/10     7
     06/11     2
     06/12     1
     07/01     9
     07/02     9
     07/03     4
     07/04     5
     07/05     2
     07/06     4
     07/07     4
     07/08     1
     07/09     4
     07/10     8
     07/11     4
     07/12     5

Answer 1

I got somthing in SVG charts i.e if the query of a chart returns rows more than specified Maximum rows limit then only the dot points (not full line) will print on canvas otherwise the chart normally print the line on canvas.
i am not been able to find any Apex document of this type of SVG conditions, if any body have then kindly revert.