In my opinion there is nothing wrong with the OP asking for more money - that is a business decision on her part and between her and her contracted client (in this case Sentry). I disagree that it makes her selfish, lazy, etc. etc. Why not ask for more money when you are having to do extra work, the worst thing that can happen is that the company refuses, right? On the other hand, I do think that coming and complaining about the outcome as though it was "unfair" and the cupibility was all on the MSC and then showing anger at the people who point out otherwise is unnecessary at best. Just as we as shoppers care about our reputations, MSCs and schedulers also care about their image and being slammed publically is something that most of us (shoppers, schedulers, MSC owners, etc.) take seriously.
Although I think there was nothing wrong with the OP asking for more money... there is also nothing wrong with Dave or the company refusing the request. Again, it is business. Most of us have lost reports at some point if we have been shopping for any length of time. These lost reports happen on lots of different software platforms (some more than others). Considering the number of reporting software used, paired with different computer OEs, ISPs, etc... there are a lot of variables at work here and we will never know where the problem originated.
My personal opinion (which I know means nothing) is that it was probably a Prophet issue. I hate that reporting software and from a totally qualitative standpoint, it seems to have more issues like this than other software packages. But who knows... maybe the shopper's ISP dropped or timed out and it was not obvioius to the shopper, maybe it was something specific to Sentry or they were doing maintenance to the form at that exact time.
There are costs on both sides here. Jeanne spent money and time on a report for nothing. Personally, I would have re-done the report, but the nature of the ICA is that this is her choice. On the other hand, Sentry spent time scheduling her and then corresponding with her about the missing report, etc. and in the end they are right back where they started - having to schedule the shop again to someone else. If there are enough loose-loose situations like this, then eventually pressure will be put on improving the reliability of the system.(s) in place Until then, protect youself as best you can - rather that means saving separately in a different program, entering all at once and not taking "breaks" or whatever.