question in regarding to resolution of domain name

Hi Guys,

Just a quick question, i don't know if this is because of pro-site plugin or the setup wp multi site. The problem is this:

Case 1. - resolves correctly to the main site.
Case 2. - resolves to
Case 3. - resolves to /prosite too (if there isnt blog named anything)

Shouldn't Case 2 & 3 resolve back into the main site instead of /prosite?

In my DNS editor:	    14400  IN  A             123.345.66  14400  IN  CNAME
*          14400  IN  A             123.345.66

Any thoughts?