I travel with 2 adults and 1 child so it’s basically the default search for me. Which is funny because with a child more benefits are extended yet it’s free to add them in this case whereas adding an adult which literally costs the hotel nothing costs more.

OP could always call or email the property to change the guest count. As it’s an award stay and using a TSU I see no reason it should be an issue.

When a suite is bookable on points there is no fluctuation based on guest count as there is on the cash rate. The property is free to say no, but no extra benefits are being extended I also believe I saw an award room of 2 Twin Beds with 3 adults so if it’s that big of a deal rebook that then use the TSU, but I wouldn’t foresee an issue.