Blender Bones Issue

Hi all! I was making some Skinned Meshes to test and use, but I realized something weird was happening. Everytime I imported my FBX mesh into Blender to make another animation for my rig, it added extra bones. The image attached below is an example of it. On the left is what the rig is supposed to look like with bones but when imported into Blender, looks like the right. Keep in mind, I export the rig with FBX and in Blender, so I don’t understand what’s going on. Can anyone please explain why this is happening or any solutions to fix it? Thanks!

how are you importing the mesh to blender?