New tree issues

I just planted (3) new trees, all the same way. Dug 2-3x the width and 1x the bucket depth.

Opened the roots up so nothing was encircling the bulb…and back filled with 50-50 blend of existing clayish soil + shrub/tree/organic compound from home depot.

Only one of my trees is doing this.

In all tree newly planted areas, the hydrometer is saying “wet”. Is something seriously wrong?