Can someone explain what this means on Harvard's Price Calculator?

[Erin_s_Dad]

It certainly looks like that but seems to contradicted by the FAQ:

If either parent is remarried, financial information about their new spouse and dependents, if any, should be provided. In this way we obtain the fullest possible picture of your financial background and can make the fairest judgment about your need for assistance

https://college.harvard.edu/frequently-asked-questions

Call or send an E-Mail and ask.