Theme-XML seems to being programmed messy. So there are two solutions for you (in real three)
1. Unpack the theme, find the XML and modify the values until everything is right
2. Use other themes or no themes (for real, you use dashlaunch only once for setting everything up, it's rare that you use it often)
(3. F*** that sh1t, we're outta there, don't care about it, sh1t happens ^^)