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Ok...I've got a solution here containing xylene, methanol, and water (and some cells and eosin).  I know that methanol is soluble in both. 
Will I notice a more noticeable interface between the two solvents (water and xylene), or will methanol just prefer one more than the other without any visible difference? Lets say if it preferred to be in water>xylene, would the methanol that is in the xylene not be hanging out right at the interface between the two?
Secondly, I was told by someone in my department that the cells should be 'soluble' or suspended in either solvent pretty much equally, but will eventually settle towards the bottom.  I am not disagreeing with them, but I don't understand, since the cell membrane is mostly composed of lipids (although it does have a polar phosphorous head group), would it not prefer the xylene, or is it that polar headgroup that makes it pretty much not prefer either solvent?
Thanks.

[minimal]

Does anyone have any idea at least regarding the first part of the question?  Or know where I could look up about the behavior of a certain solvent when it's in solution with two other solvents that it is soluble in, but the others are not miscible?