I could not craft stone steps, but, as in the screenshots, I can craft stone slabs from diorite, andesite and granite (or from any combination of diorite, andesite, granite or cobblestone when using the MATTIS crafting system). On win10 (using the PC crafting system) stone slabs can be crafted from any combinations of these materials except for cobblestone. Strange.
Addition by Mega_Spud
These can also be used to craft repeaters and comparators as well as stone slabs using the Windows 10 PC crafting system, which creates an inconsistency between versions (See ticket
MCPE-25191 for this issue).
original report follows
as everyone knows,diorite can't be made into a stone steps,but I let a diorite to it ,not only in Build 7,but also in Build 8
The Device of me is RED MI 1s