[n1ql] Results are different in query using covered Intersectscan of array index and primary scan

Found this issue while verifying:
https://issues.couchbase.com/browse/MB-22757

Index created:
CREATE INDEX idx ON default( DISTINCT ARRAY v FOR v in join_yr END)

Query issued:
EXPLAIN select meta().id from default where any v in join_yr satisfies v = 2016 END and (ANY v IN default.join_yr SATISFIES v = 2014 END)

This query uses the right index and is a covered query as expected in MB-22757.
But it gives different results than the same query using primary index.

select meta().id from default where any v in join_yr satisfies v = 2016 END and (ANY v IN default.join_yr SATISFIES v = 2014 END) order by meta().id limit 2

gives different results than

select meta().id from default use index (`#primary`) where any v in join_yr satisfies v = 2016 END and (ANY v IN default.join_yr SATISFIES v = 2014 END) order by meta().id limit 2