BB-reStructuredText does not support subscripts? (BB-10188)

I have a need for markup for both subscripts and tables in both {{README}}s and wikis. I thought BB-reST might satisfy this requirement, since reST supports both and BB supports reST for both {{README}}s and wikis.

I run debian with pandoc=1.9.4.2 installed, so I downloaded one of my {{README.md}}s, converted it to reST, and edited the output, eventually producing https://bitbucket.org/tlroche/lightningnox/raw/dc5d1087f0741786b300d2676b2a500c72dcbf92/README.rst

When I convert that to PDF with

pandoc -r rst ./README.rst -o ./README.pdf

the output ( https://bitbucket.org/tlroche/lightningnox/downloads/README.pdf ) renders subscripts appropriately, so my syntax is pandoc-correct. (Unless pandoc's LaTeX renderer is correcting output from its reST renderer, which seems unlikely.) But the BB-reST renderer @ https://bitbucket.org/tlroche/lightningnox (or @ https://bitbucket.org/tlroche/lightningnox/src/dc5d1087f0741786b300d2676b2a500c72dcbf92/README.rst?at=master ) does not render the subscripts correctly. (BB-reST also has a problem rendering some links, for which I made a separate issue.)