Data repetation in my output when I used join query in sqlserver

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SQL-Server-2008R2

Question: Concatenate values from multiple columns of 3 tables and display in one column. Date field is datetime.now my problem is if date is repeat of one table then amt2,amt3 is also repeat on same date
table1:

date        amt1
-----------------
1-1-2016    111
1-1-2016    222    repeat date
3-4-2016    111

table2:

date        amt2
-----------------
1-1-2016    101 
2-2-2016    333
2-3-2016    444
3-3-2016    456
1-4-2016    101     
3-4-2016    111     

table3:

date        amt3
-----------------
2-2-2016    001
2-3-2016    002 
3-3-2016    003
1-4-2016    555
2-4-2016    666
3-4-2016    777

query

SELECT 
    COALESCE(t1.date, t2.date, t3.date)
  , t1.amount
  , t2.cashamount
  , t3.grandtotal
FROM tb_amount t1
FULL JOIN tb_cashamt t2 ON t1.date =t2.date 
FULL JOIN tb_grandtotal  t3 ON t2.date = t3.date

output:

date        amt1     amt2    amt3
----------------------------------
1-1-2016    111     101      NULL data repeat on amt2 and amt3
1-1-2016    222     101      null 
2-3-2016    NULL    444      002 
3-3-2016    NULL    456      003

------------------------------------
TOTAL       ---    ---     ----- 

Desired output:

date        amt1     amt2    amt3
----------------------------------
1-1-2016    333     101      NULL 
2-3-2016    NULL    444      002 
3-3-2016    NULL    456      003

------------------------------------
TOTAL       ---    ---     -----

What I have tried:

Concatenate values from multiple columns of 3 tables and display in one column. Date field is smalldatetime.now my problem is if date is repeat of one table then amt2,amt3 is also repeat on same date.i explain desired output in the same date total amt1,amt2,amt3 display according to date.