I got all the code updated. It still doesn't zoom to the extent of the unique route number records but on records that have the same route number it zooms to the centroid of the two records. Say if you have Hwy 1 and two segments that are 1/2 mile apart, it will zoom so you can see both. The records that have one instance it zooms the same as original.
If you wish to look into this further its up to you.
Thanks,
Nate