The time slot of a band has an influence on the band's scores. In this case, the judges did not want to score Hebron too high, no matter how good their performance was, because they didn't want to inflate scores. So yes, Hebron was robbed of a second or first-place finish in 2015.
My predictions:
Hebron
Vista Ridge
Vandegrift
The Woodlands
Ronald Reagan
Cedar Ridge
Flower Mound
Coppell
Marcus
Round Rock
CTJ
Keller
Pearland
Waxahachie