Requests reports

Dear all,

I would like some help with the reports, when i run the 'completed requests by category' for example, some requests show up in the 'others' category on the chart but in the detailed report below the chart all requests are detailed in the correct category and "others" does not appear in there. I have 18 categories for the request and do not have "others" in the categories list i have customised.
I would like the chart to reflect the correct categories.
Any idea?

The other problem that i have is that i have additional status for request, i added a status called "closed-not resolved" with the type 'Close', this works well except when i run report on "Request States by Category", these shows up as open in the chart. Is there any other way to change this.

Please let me know of your suggestions.

Many thanks
Eric