The seeding criteria provided by the KSHSAA is very basic and with the proviso that it can be added to or modified.
For example, at the seed meeting in Norton it was emphasized that if there was deviation from the seed criteria put out it would be consistently allowed through the remaining weights. This led to some good discussion beforehand among the coaches as to what to include, which led to being "just" a state qualifier not being considered (another indication of just how deep this tournament was!); a state placer yes, a state qualifier, no. Also the coaches decided to not consider winning percentage as a tie breaker.
In answer to the original question, the most recent head-to-head is generally considered to be the determiner in an even match series, but generally the wrestler with the greatest number of wins in a multi-match scenario receives the higher seed.