Yes, the dynamic pricing system of Indian Railways can be a little confusing at times. The prices are revised based on the availability of seats and demand for a particular train. Hence, it is possible that sometimes the fare for fewer seats is higher than the fare for more seats. This is because when the seats are filling fast, the fares increase and when the seats are vacant, the fares decrease. So, it is all about the demand and supply of seats at the particular time of booking. I hope it helps.