Thanks a ton for the reassurances @[USER=11661]logistopath[/USER] and @[USER=14003]raksrules[/USER] . Appreciate it. THIS IS WHY I love TE 
So, I went ahead and completed the form and details via the online form option for mom. Now the next step is payment and schedule appointment, which says that the appointment will be done automatically without an option to select a date or time. Since she isn't in town till 3rd of November (and accounting for the Diwali rush/holidays) I was thinking of doing this step sometime on the 26th of this Month.. which I anticipate will give a date sometime after 3rd Nov. Just hoping there's no time limit to doing this after submission of application which I completed.
I was also looking to see if they allow a companion to accompany senior citizens at the service center.. but didn't see anything like that. There's also some confusion on whether senior citizens are accomodated directly at a dedicated counter or if they have no such provisions.