Lightroom CC presets applied to all albums

Hi,

I am pretty new to lightroom, only been using it for a few weeks. I am using lightroom CC 3.2.1

Last week I was able to apply a b&w preset to a whole album using copy edit settings. And it worked fine.

But now when I try to do it, it applies the prest to ALL albums that those photos are in, not just the one I'm working in.

I have all the photos in an album which has all the original edits. I have another album to which I copied just a few of the photos. Then I set up a third album and copied all the photos into the new album, selected all photos, and applied a b&w preset to all photos in the album. But when I go into the other 2 albums, they have turned b&w too.

I'm so confused, haha.

Please help! Thanks!