Nosing Length just shrinks the stair

[jaza008]

As you can see in the pictures. Nosing Lenght really not shrink the stair but rather send the stair backward(but it's kinda the case with landing)which I find it very weird, is there anyway I can just extend the nosing??

I'm using custom stair nose for now, but would also like to know if there is another way

[barthbradley]

Change the Actual Tread Depth.  

Basically, decide tread depth and then decide how much of the tread is overhanging the riser (e.g. nosing).  

[gregoiredechaine]

In the settings shared, it looks like your project settings are in m. Your screenshot shows a nosing that is roughly 8" which is correct. Change your nosing length to a smaller value, say 0.02 and see if that brings your stairs back into 'normal range'.