Issue with cardinalities

Hi All,

I'm going to start my work on universe ,as a part of that i'm analyzing the existing universe.

I have tested the universe and I found few things.

1. Found unknown cardinality in two cases---1. when I click on detect it is showing unknown cardinality and

                                                                 2. Already we have 1-1 relationship ,If I click on detect it is showing U C.

2.Cardinality is not valid-----1.If I click on detect,it is showing 1-n

                                        2.But they made 1-1.

3.Missing cardinality----1.If I click on detect,it is showing 1-n.

                                  2.They didn't detect.

My query is I found these mistakes ,but they fixed this universe as data source and made reports also.

When can we develop the universe like this?

Kindly help me.

Thanks

Ram