map mods shows 300% instead of 900%

hello,

i want to know if this is a bug , why does the map shows 300% when i am in a map? i am using 3 Cartography Scarab of the Multitude
this means 3 x 300% = should be 900% (Difficult and Rewarding Monsters which drop 900% increased Maps) and not instead of (Difficult and Rewarding Monsters which drop 300% increased Maps).

I imagine that you should be seeing "Area contains 24 to 36 additional packs of Difficult and Rewarding Monsters" instead of "Area contains 8 to 12 additional packs of Difficult and Rewarding Monsters".

i can see "Area contains 17 additional packs of difficult and rewarding monsters which drops 300% increased maps" but the "which drops 300% increased maps" should also changed to 900% as i am using 3 x Scarab of the Multitude