It is a bit confusing, I'll agree. Broken down it's a little more clear.
Last night's game with A&M CC and SE Missouri...those were automatic bids due to conference championships, right? While the A&M CC team is a conference champ they are also seeded lower than Pitt or Mississippi State (two of the last for invitations.) The committee selects the 36, then seeds the 68, then fills the brackets.
The last four in are seeded higher than the 12 in (#13, 14, and 15th seeds) so when they are entered in to the "64 team bracket," they fall respective to where they're seeded.
Does that make a lick of sense? I know what they're thinking here...explaining it is another game in itself.