Below is the wording from their website. Only in determining hosts is the word "seeding" even mentioned.

Bracket guidelines:
The committee makes every attempt to distribute the top schools evenly across the bracket.
First-round pairings are determined initially on team strength (i.e. a top tier team plays a bottom tier team; a middle tier team plays a middle tier team) and then may be adjusted with consideration to school location, conference, and prior meetings among teams, among other factors. See below for details.

*Teams from the same conference will not meet in the first round. If possible, conference teams will not meet in the second round as well.
*Rematches of regular-season games shall be avoided, if possible, in the first round.
*Some pairings are dictated by schools’ ability to host. For example, two schools that cannot host will not be paired with each other.
*Factors can preclude teams from being placed in their natural grouping when it comes to bracketing games. These factors include travel issues, school location, facility availability, lodging constraints, previous games with WNIT opponents, etc.

The committee strives to achieve competitive balance within each quadrant of the bracket, as well as tries to limit teams’ travel and missed school days.

How the host schools are chosen
The host site for each game is selected by the WNIT committee based on several factors such as fan base, host bids, facility availability, tournament seed, travel constraints, etc. A team's desire or ability to host or not to host has absolutely no bearing on that team being chosen for the 64-team field.