Read some of the other posts in this subforum, for one.
You have 2 potential issues:
- Newer versions of uTorrent (3.x) are utter crap, especially for seeding. The last good version is 2.2.1, although many people prefer 1.8.5.
- Most of the torrents on BakaBT are rather heavily seeded; you are competing with many others to upload to a limited number of downloaders. The only reliable fixes are to keep as many torrnts possible seeding for as long as possible, or renting a seedbox.