Piano Forum

I've been working on Chopin's Polonaise-Fantasie (Op. 61) for some time now, and something that I'm trying to solve is the last two pages. The right hand has triplets but for every triplet there is a long-short rhythm on top as well (a dotted eighth note followed by a sixteenth note). The left hand also has this long-short rhythm but in octaves. The thing is, on the Henle version, those rhythms line up, even though in technicality the sixteenth note from both the left hand and the top right hand should come just a bit after the third note of each triplet.

My question is- Should I be playing the sixteenth note a bit after the triplet or should they be together? I've listened to several recordings (including my Ashkenazy CD, Horowitz, Kissin, as well as some more modern performances) and they all seem to be playing the notes together, which seems odd to me. My Henle Polonaise book just states that the rhythm should be played at the discretion of  the performer. But I still don't know why, if those notes are meant to be played together, why add a dot to the end of the eighth note? Why not just make the other two voices triplets as well?