The fact that the school doesn't have a record of your DD's actual test score on her first test really doesn't make sense since it's a computer adaptive test capable of spitting out a bunch of subscores along with the main score and the Lexile range. If your DD's teacher just copy down and input the single number representing the main score, that doesn't provide sufficient information for a report.
DD had to retake the Math Map once last year because she didn't get a chance to complete the whole test (adminstered over two sessions) within 3 or 4 weeks so the computer deleted her test and she had to start all over. It would make sense that you have to delete the old test before inputting a new one since they would both be winter scores. However, I thought the district has the software to generate the reports so I am not sure why NWEA would need to be involved?