Multiple controller buttons to one emulated input function

Gidday guys, I feel like a horrible noob asking this…but I can’t seem to get Mupen64plus on retropie 3.0 RC1 using multiple input axis or buttons as the one input. The command file specifies

DPad R = axis(4+) hat(0 Right)

but when I try the likes of

Z Trig = button(7) button(6)
or
X Axis = axis(0-, 0+) axis(2-, 2+)

Only the first option entry is used. I don’t know if this is a bug or if I’m reading the suggested command method wrong so after my google fu ran out and the frustration kicked in I decided I’d ask.

Once again sorry for the noobness!!!