Our bill was around 180 for 4. But my sis got the enV touch so that is an extra 9.99 for data and 29.99 for my BB plan.

Her line is 129 because it is the primary. Grandma's says 9.99 because that is the base price for the extra lines. I suppose yours is 29.99 b/c of the 9.99 line fee + whatever extra you have ie navigation or visual voicemail or data plan. Do you not have access to your mom's account on vzw.com? I set it up for my Daddy and am the one that did the upgrade/plan change (for the whole fam).