Minecarts with chests don't stack as expected in redstone mechanisms.

NVIDIA Shield Tablet K1

In redstone mechanisms for the sorting and calling of items, minecarts with chests do not stack to provide "infinite" storage as expected. The videos listed below provide examples of the mechanisms. Instead, only one of the stacked chests is addressed by the mechanism.

http://youtu.be/FwERRca3rp0

http://youtu.be/PsFXAISBUBc

http://youtu.be/nDOAKo_m_mQ