Indian Railways — (rake/coach position) confusing ac coach placement

Address:

Bokaro, Jharkhand, 827012

Ac coaches should be placed either before or after the sleeper coaches and not in between. I was travelling in train no 15027 maurya exp and i got confused about where my coach (S5) was. I got too late finding my coach since the ac coaches were placed between the sleeper ones. Due to lack of time, i almost missed the train. So this must be taken care of. Arrangement of coaches in 15027 is like this time, s1, s2, s3, s4, b1, a1, s5, s6... This is not in arrange way... Please solve the problem... At night also ac coaches are closed... How we can go s1 to s6 at that night time... Finally no any benefit for this confusion coach arrangement.