Brush adds white or black streak instead of mask

Hello,

Still getting used to photoshop CC but I have a little glitch that occurs, when i am in quick mask mode and i want to adjust the selection with the red field , when i choose the white or black squares it instead creates a white or black streak instead of actually a red streak meaning its adjusting  hopefully someone knows what it means) has anyone had this issue where the brush doesn't adjust the mask it simply paints white or black ?/