These posts should be helpful for #1. The “Split” title is actually an image:
http://forums.realmacsoftware.com/t/yazool-split-theme-replace-title-with-logo/11093/5?u=thang
And these may help for #2:
#intro h1 {
text-transform: none !important;
}
.main-nav a {
text-transform: none !important;
}
You can put them in the site-wide CSS settings.
There have been quite a few posts about customizing the Split theme, so don’t hesitate to search the forum. 