Not catching on

The newest care plan nurse hired in my facility has been there since the very end of June. Near the end of October I starting giving her some extra training and assistance (because she said she didn't receive enough when hired - which was about 2 wks worth by the gal that she replaced) I've been reviewing her MDS' for the last 2 weeks (at the request of my supervisor) and finding numerous coding errors. So I went to her, and after going over the mistakes I found, I said "After this much time doing this job, and the extra training that you received at the end of October, I expect that your MDS' be getting better - and their not". Her reply was "Yah, I know". That was it. And she thanked me for helping her out as much as I did. Needless to say, the bosses are looking for her replacement -- and she's probably looking for our -- considering her reply and lack of concern voiced. Thanks for letting me vent. Tara