1 - days past due in observation period = 0

2 - days past due in observation period are between 1 and 30

3 - days past due in observation period are higher than 31

So I created two dummy variables where a reference group is the worse one (category 3).

I put these two dummy variables into a logistic regression in order to obtain some statistics and in order to check a business logic of the variable.

But prolem is, that I got a really strange results. Coefficients are unusual, standard errors are very large and all of the parameters are not statistically significant. (please, see attached print screen)

Then I got an idea to put the same data into a Probit analysis. And suddenly I got acceptable and valid results (please, also see attached print screen).

I seriously ask you for a help/ideas regarding this issue because I not able to explain why this happens.

Thank you very much in advance.