I've just started playing Dwarf Fortress vanilla. I'm following a guide and it had me dig a staircase down, which I have done. The problem I'm having is that my miners won't go down the stairs to dig out on the next level down - The only thing I can see is that there are some 'gabbro' blocks that blocked construction of the stairs.
Are they causing my issue, and if so, how do I remove them?
If they are not the cause, what's making it so my miners won't go down to the next level?