yes, the filters are the right way, i'm not that stupid
i do however have a theory on the color tint..
quarter wave plates are really only good for a single wavelength(usually green). This means that no matter what, all wavelengths other than green WILL end up
more or less ellipctical instead of the completely circular waves that we want.
now, when we rotate the cpl, we clearly see that there are two distinct ways of holding the filter.. the "wrong" way with magenta color tint, and the "right" way when rotated 90 degrees.
this happens because we are essentially aligning the quarter wave plate either to enhance the elliptical waves created by the first filter, or to undo them.
when holding it the wrong way, only green light gets properly retarded back into linearly polarized light(since it's perfectly circular) and absorbed by the polarizer. Other wavelengths are now made even more elliptical as they pass through the wave plate. this means they will pass through the polarizer quite easily. This is the reason for the magenta tint - Green gets cut, and red and blue pass right through the polarizer.
in the other case(the right way), a tiny bit of light will pass through the polarizer due to imperfect wave plates, but the end result is still a very usable image
now this is just what my common sense thinks is going on, I'm not a physicist or anything.
i did however get an MVG in fysik B