Grenades Satchels Mixed up

The higher-level grenade satchels are mixed up. The Prodigious satchel is called Tier 2 and giving a lower gear score with Tier 5 materials than the Refined satchel which is called Tier 3. I think the Refined satchel should be Tier 2, The Great satchel should be Tier 3 and the Prodigious satchel should be Tier 4 in line with other weapons. The Prodigious Satchel costs 1300 purple essence which is in line with mystic or dauntless tool types. Also the Prodigious satchel is at a realm trader while the ?refined or great satchel is at the Watch.