Stair Modeling Sketch - turning point went wrong

[chmechailidis]

Hello Everyone,

I am sketching a stair and i want to have sharp steps. However, once i exit sketching the turning point becomes circular. Anyone knows why is this happening?

Thank you. 

[RDAOU]

@chmechailidis 

I do not seem to be having this issue here...maybe you can attach the file for the stairs in question