Recruits are choosing to make their commitments very early these days. A school like Texas gobbles up most of their class in February, not on signing day but as in the February of the recruiting year, meaning a full year before recruits can even sign with the Longhorns.
With recruits making early decisions, this gives them even more time to think and second-guess their decisions. This leads to wavering and making visits to other schools, to which the committed school has to start recruiting the player as if he is not committed to them.
This is the case for the next 14 recruits. These prospects are committed, but that is only for now because they clearly are wavering.
EDIT: Max Redfield, a USC commit, is also wavering per Scout.com.