Maybe, apt-cache depends can shed some light. It seems wine32 depends
on libwine:i386 and the latter breaks wine32.
Here is the output:
$ apt-cache depends libwine:i386
libwine:i386
Depends: libc6:i386
Depends: libfontconfig1:i386
Depends: libfreetype6:i386
Depends: libncurses5:i386
Depends: libasound2:i386
|Depends: libglu1-mesa:i386
Depends: <libglu1:i386>
libglu1-mesa:i386
Depends: liblcms2-2:i386
Depends: libldap-2.4-2:i386
Depends: libmpg123-0:i386
Depends: libopenal1:i386
Depends: libpcap0.8:i386
Depends: libpulse0:i386
Depends: libx11-6:i386
Depends: libxext6:i386
Depends: libxml2:i386
|Depends: ocl-icd-libopencl1:i386
Depends: <libopencl1:i386>
ocl-icd-libopencl1:i386
|Depends: ocl-icd-libopencl1:i386
Depends: <libopencl-1.1-1:i386>
ocl-icd-libopencl1:i386
Depends: zlib1g:i386
Recommends: libcups2:i386
Recommends: libdbus-1-3:i386
|Recommends: libgl1-mesa-glx:i386
Recommends: libgl1:i386
Recommends: libgnutls30:i386
Recommends: libgsm1:i386
Recommends: libjpeg62-turbo:i386
Recommends: libodbc1:i386
Recommends: libosmesa6:i386
Recommends: libpng16-16:i386
Recommends: libtiff5:i386
Recommends: libxcomposite1:i386
Recommends: libxcursor1:i386
Recommends: libxi6:i386
Recommends: libxinerama1:i386
Recommends: libxrandr2:i386
Recommends: libxrender1:i386
Recommends: libxslt1.1:i386
Recommends: libxxf86vm1:i386
Recommends: libgl1-mesa-dri:i386
Recommends: libasound2-plugins:i386
Recommends: <fonts-liberation:i386>
fonts-liberation
Recommends: <fonts-wine:i386>
fonts-wine
Suggests: cups-bsd:i386
cups-bsd
Suggests: <ttf-mscorefonts-installer:i386>
Breaks: wine32:i386
edbarx@edbarx-pc3:~$ apt-cache depends wine32
wine32:i386
Depends: libc6:i386
Depends: libwine:i386
Breaks: <wine:i386>
Breaks: wine32-preloader:i386
Recommends: <wine:i386>
Suggests: wine32-preloader:i386