Problems: Scrapers deliver very few results & Screensize

Hello @all,

i am completely new to xbmc.
My movies are organized as follows: "Name from imdb" (.)tt"imdb-Number". So, there is the full official name of the movie in the filename, and the unique IMDB-Number.
Before i switched to xbmc i read somewhere that xbmc can identify movies exactly by that imdb-number and build up a library.

In my "test-directory" there are about 20 movies.
Now i tried several scrapers:
the IMDB-Scraper finds ONE (ONE !!!) Movie. Big lol!
OFDB finds THREE.
Universal scraper finds EIGHT.

I dont get any request from xbmc while it searches for content. It just finishes the work with the depicted results. End.

Now my questions: is this NORMAL? How can i improve the results of the scrapers? I dont know where i read that xbmc can analyse imdb-numbers, but i am sure of this. So, which scraper can do it?
Is there a xbmc-tool that works like zeeb, which is the best movie-analyzer i know?

SECOND Problem:
I cant get a fullscreen output. My Beamer is 1280 x 800, so 16:9 Movies dont fill the whole screen. I tried video options, but "Stretch 16x9" doesnt have any effect.