Topic: Villa Lobos Bachianas Brasileiras no 6 question (typo?)

In the second movement, after the Allegro (Tempo I) (on page 14 in my score) just before all of the flute 8va 9-tuplets. OK, so you know where I am now. The 5th and 6th measures of the Allegro Tempo I. Are those supposed to be alternating low B-flat and B-natural to maintain the minor third pattern established in the previous measures and continued on the next page? Or are they all really supposed to be low B-flats?

I'm thinking they should really all be compound minor third intervals.

M.M.A., D.M.A. University of Illinois at Urbana/Champaign: B.Mus. Lawrence University
Bassoon professor at University of Wisconsin Eau-Claire
Maker of the Little-Jake electric bassoon pickup and Weasel bassoon reeds