RailFanning is our All-Rounder Glucose that gives us Instant Power in All Seasons - Kirti Solanki

Hello Friends,
This is my first post in this portal.
Since airfare are sky rocketing now-a-days (mine is from BIAL to BBSR), this time i have planned to go to my native Balasore on 21st Dec by train. Today is the first day of booking for 21st Dec journey. Before 8 AM, found only 15 seats are available for II Ac category, which can booked via internet. My booking got over by 8:06 and below are the status of my tickets.
Person...
more...

Own_choice railway_mercy
==============================
Father (67) Lower RAC I
Mother (59) Lower Side Upper
Wife Side Lower Upper
Self Side Upper RAC II
I just want to know why only 15 berths are released for net booking. Is it included the berths that can booked from railway counter ?
Both my parents have gone through major surgeries (like mother - spinal, father - total knee replacement on both legs) and i am just worrying how they can travel if at-least we won't get 2 lower berths. Even my 1 year old son will be with us. I will try to swap (to get at least 2 lower berths) with other fellow like minded travelers on spot. Friends do u have any idea what is the possibility that 2 of my RAC tickets will be confirmed and can the TTE help me to get 2 lower berths against the 2 RAC tickets (if it by chance get confirmed).
Thanks,
Santosh
Do I need to post my PNR # here ?