Difference Between Quashable Orders & Non-Justiciable Matters

Main difference ki kya hai, ya fir ekdum same hai? Kya hum logon ko confuse karte hain, ya fir hum log hi confused hai? Mera doubt yeh hai ki non-justiciable matters mein, court ki power hi nahin hai, lekin koi bhi court aapko quash kr sakega yeh kaisa? Aur agar koi bhi court order ko quash kr deta hai, to woh non-justiciable matter hai na? Kya to main wrong hoon? Maine Sajjan Singh vs Narsinghra case read ha, aur yeh sab kuch yahaan likha hua tha, lekin fir bhi mera confusion rehta hai. Anyone help?