Collision mesh shown together with LOD in detail levels

Hi,everyone,

My model has 3 LOD(lod125/50/2) and 5 collision mesh(Col-1,-2...-5)

When I Load the model in Showtool and open "Detail Levels", I see 8 Detail Levels:

LOD0 - detail size125
LOD1 - detail size 50
LOD2 - detail size 2
LOD3 - detail size -1
LOD4 - detail size -2
LOD5 - detail size -3
LOD6 - detail size -4
LOD7 - detail size -5

Why the collision details are also shown in detail level as LOD? Did i do anything wrong during export to cause it?

And although the collision details are listed here, the real LOD are only the first three ones(detail125/50/2),right? Need I do something to revise it or just leave them there..?

Can anyone advise? Thanks...