A probleme with graphs

[kobi]

I made a report with a graph using data from a table.
The graph type is "dot".
All line types were chosen to be dots connected with lines.
However the output of the graph does not conect some points in the graph and I cannot understand why and what is the difference between some points (that come out connected) and others (that do not) from the same table.
can someone explain this?

 

[mdcory]

Can you post a screen shot?

 

[kobi]

Sorry,

this time with the attachment...