Problem with 1:1 relation in creating report

[pouryas7]

Hello,

I have two tables: 

T1 {t1_ID, name}

T2 {t1_ID, address}

There is a 1:1 relashionship between these two. So, T1[t1_ID] = T2[t1_ID].

T1 has much more records than T2.

T1 - t1_ID, name

          1         Jack

           2        Peter

------------------------------------

T2- t1_ID, address

        1       150 cooper st.

----------------------------------------

Now, if I choose, T2[t1_ID], T2[address], T1[name]  in report tab, 

Power BI does not do the inner join or left join. It shows me the prodoct of these two table.

Result:

1          150 cooper st.       Jack

  -                    -                 Peter

If I change the relationship to 1:* in the relationship tab. It gives me what I want (The inner join of these two table)

What is wrong?

Is it a bug or I misunderstood the tool                             

Thanks