Errors in Order Guide Support

Seeing some weird errors in the Console when running the Order Guide Support page:

1) Issue with ng-model on 2 Date fields:

Expression 'Item.IntroductionDate | formatDate: ShortDateFormat' is non-assignable. Element: <input id="txt-introduction-date" class="form-control ng-pristine ng-untouched ng-valid" ng-model=" Item.IntroductionDate | formatDate: ShortDateFormat" ng-readonly="true">

Expression 'Item.DiscontinueDate | formatDate: ShortDateFormat' is non-assignable. Element: <input id="txt-discontinue-date" class="form-control ng-pristine ng-untouched ng-valid" ng-model=" Item.DiscontinueDate | formatDate: ShortDateFormat" ng-readonly="true">

2) When leaving the page:

TypeError: Cannot read property '$dirty' of undefined

I do not believe that these errors are actually affecting functionality, but I would like to get them cleaned up.