I don't find it suspicious, but it's interesting. I guess it goes to show how much difference a different performance and different judge can make. I was surprised that the percussion were scored so low for prelims in comparison to their other rankings; I figured I must have missed a big hiccup.
I'm not sure about the percussion, but the Aledo band as a whole had a significantly cleaner run in finals than in prelims.
Overhearing discussion afterward, Aledo is THRILLED to have tied Wakeland. There has been some friendly rivalry there, but Wakeland has historically come out on top.