Using levels after using black/white makes images blueish?

[Kneops]

I made a black and white preset for myself as good as possible, using the black and white plugin. After I do that and I check the checkbox in front of the levels, it makes the image blueish and not really black and white anymore, so it somehow adds a bit of color to the image. Is that 'normal'?

[afx]

Curves/Levels sits after the BW plugin in the pipeline, so it can be used on RGB channels for toning.
But Autolevels should not do anything in RGB channels, so this sounds a bit strange.

cheers
afx

[Kneops]

Sorry, I meant curves.

This is before clicking curves: http://minus.com/lbbiqy1dkFiFxG
And this is after clicking curves: http://minus.com/lVduL2KNndMxZ

I assume I can also use curves with black and white images, like I do in Gimp.

[afx]

Your curves look like they are not in Sync RGB wise...
Press the reset button on the curves and then perform the adjustment on synced curves.

cheers
afx

[Kneops]

Thanks! That was it. I thought I clicked both reset buttons, but I must have clicked only the one on the right.