I think it might. I have been reading a book titled "Breaking the Bipolar Cycle" (which I recommend enthusiastically) and it talks a whole lot about challenges that are not in the realm of mood. Information processing challenges, and stemming from them, challenges in getting started on projects, in organizing, basically in what we call project management or executive functions. It does not talk about messiness per se, but it talks about processing large amounts of information, as in studying. Studying was not difficult for me at all, but that was so long ago, I do not know how it would be now. But decluttering is basically taking in and processing a large amount of information. That is why I think it is bipolar. Also, I "inherited" it from my bipolar mother and did not inherit clean traits from other relatives despite close contact, which also makes me think it is bipolar.