Query / Union of tables with date column

Hi,

I want to create a new query table based on Table1 and Table2:

Table1

Column1 (Text)    Column2 (Date)

X                          30 Apr, 2009 23:15:34

Y                          12 May, 2009 23:15:47

Table 2

Column1 (Text) Column2 (Date)

Z 18 May, 2009 23:15:34

Using this SQL Select Query:

SELECT "Column1", "Column2" FROM "Table1"

UNION ALL

SELECT "Column1", "Column2" FROM "Table1"

Executing the Query the result is OK:

Column1 (Text)    Column2 (Date)

X                          30 Apr, 2009 23:15:34

Y                          12 May, 2009 23:15:47

Z                         18 May, 2009 23:15:34

But, after saving the same query and pressing <view mode> I get other result:

Column1 (Text)    Column2 (Date)

X                          01 Jan, 1970 00:00:02

Y                          01 Jan, 1970 00:00:02

Z                         18 May, 2009 23:15:34

Any idea to solve that?