These spawn alongside vanilla raptors due to issues with the DevKit surround adding respawns for Dinos with alpha variants. If you wish for modded Raptors only to spawn you can prevent vanilla spawns via ini file. There's more info in the discussions and patch notes.

put this in game ini.
NPCReplacements=(FromClassName="Raptor_Character_BP_C",ToClassName="PackRaptor_Character_BP_C")
PreventDinoTameClassNames=Raptor_Character_BP_C

this npc replacement disables the spawn for ALL raptors, dont use it