[Multiple lines on graph]

Its very simple to display multiple lines. For this you don't have to write any subdata query or multiple queries. You can simply select for multiple values by declaring a Parameter for multiple values eg: value in ($P!{parameter})

 

Giving a syntax like this will enable you to give multiple values for a single query. Also note that in GROUP BY clause give a group by of "value".

 

Hope this will solve your problem.

[Reset and Increment Type in Crosstabs?]

Reset type means that the crosstab will calculate the data for the entire report and reset type to page would mean that the crosstab will tabulate the data pagewise.