I am not sure, but I think windjammer is partially correct. I have had the same question in years past and have been confused by the answers.

Obviously seeds 1 v. 4 and 2 v. 3. I think the only unknown is what 1 v. 4 winner does the 2 v. 3 winner wrestle? There are only two choices each year, not four. So they don't completely draw the second round. For example this year round one would look like this:

I-1 v. IV-4
II-2 v. III-3 or II-3 v. III-2 (this is the unknown and draw)

II-2 v. III-3 or II-3 v. III-2 (again unknown and drawn)
IV-1 v. I-4

(likewise for the other 8 kids)

Otherwise, if they drew the entire second round, you might have the number 1 and 2 from the same district wrestle each other in the second round. I am no expert or authority, but I looked at our state brackets three out of the last four years and it has always looked like the above. And common sense would say you would not draw and have kids from the same district facing each other in the second round.