Amarkantak Express: Holy for Railfans as holy as Amarkantak is for devotees. - Ayan G

Hi,
We are traveling from Bangalore to Chennai by evening Shatabdi on June 2nd. 2014 (Train# 12008). We are a group of 6 (myself, wife, 2 kids and 2 elderly parents).
When we had booked, we got 4 tickets confirmed and 2 waitlisted. But the 4 confirmed tickets were far apart and spanning multiple coaches, viz. C7/2, C7/78, C4/67 and C6/26 (in "coach/seat" format). This would be unmanageable (parents cant be left alone, kids cant be left alone), so I immediately booked one more ticket on same train knowing that all 6 seats...
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on it waitlisted, but with the hope that there is a chance that they’d be confirmed in a chunk (at least same coach), and I can then cancel one of the tickets. I was hoping that the bulk-reallocation-upon-cancellation algorithm would work that way.
Today when I checked, all the waitlisted 8 seats are confirmed (2 remaining from first ticket, and all 6 from 2nd ticket), but the seat#s aren’t yet stated.
I’d like to retain the one that has a high chance of seats being in the same coach (or atmost spread over 2 coaches), and cancel the other one. By that reasoning, would I be right in canceling the former ticket (that had C7/2, C7/78, etc)? Should I cancel right now, or should I wait till chart preparation (I run the risk of losing a lot of money; I dont mind losing it if its worth it; but the way I see it, the ticket with C7, C4, C6 is bad enough, its hard to get worse than that, so might as well cancel that one now itself rather than waiting and losing money and getting an equally bad seat allocation)
Any advice?
Thanks,
Venkat