Parkers Hail of Bullets 1 or 2 pieces of terrain?

[enchantedsord]

Generally each piece of hazardous is flipped separately.  Would this apply to Hail of Bullets?  The wording says,  Place two 50mm Ht 0 Hail of Bullets Markers in LoS touching each other within 12'' and not in base contact with any other model or Marker. These Markers are a Hazardous Terrain Piece ...

 

Since it says these markers are a Hazardous piece of terrain does it mean each marker or the 2 as a set.  I would think they are each independent but there is some question on this since they can be moved individually by abilities like Aionus's marker move.  

[Seadhna]

The wording seems pretty obvious: if they were separate, it would be "These markers are hazardous terrain pieces"

[Bengt]

For comparison Kaeris' On the Pyre action creates two markers and say "These Markers are Ht 5, blocking, hazardous terrain."