A specific QueryOption clone rangeQueryOptions with the index specically overriden is created, but is not actually used in the query:
https://github.com/ngageoint/geowave/blob/master/extensions/datastores/accumulo/src/main/java/mil/nga/giat/geowave/datastore/accumulo/mapreduce/GeoWaveAccumuloRecordReader.java#L138

Seems like an oversight to me?