Greeting sir

I'm studying a protein mutation effect using M.Dynamics, and when got results a used chimera to view my protein.

in this snapshot http://imageshack.us/photo/my-images/839/errya.jpg/ you can see the first arrow (helix distortion, which predicted as a mutation effect ) and a second arrow showing the discontinuity the helix,where its final turn is replaced by a coil.

My question is this coil a secondary structure detection bug in chimera,because when using other tools (pymol, vmd ) they detect this final coil as a helix.

thanks