Indian Railways — first class tickets on uts app

Address:

Mumbai City, Maharashtra, 400066

Last week tried to book first class tickets for me and my wife on mumbai local train. The uts app did not allowed to book two tickets and it was allowing to book two second class tickets. I have send a mail the reply i received was"
Passenger can book 4 passenger in second class and 1 passenger in first class per journey ticket.
Being high amount first class ticket 1 passenger allowed per ticket.

Passenger can book number of journey tickets at a time

Railway should differentiate the first class tickets of local suburban v/s long distance trains.