Issue in Migration

I have data souces which are flexible update method. While migrating to 7.0 the update rules are missing. I am not able to see the update rules. 

The below method is working fine for  single  target. But the scenario is like below  by following this method ( when click on data source migration, the update rules for one system will disappear)

1st I did for S.No 1 and it is fine and I have loaded the data.  But when trying to do for S.No  2, I am unable to see update rules for that .

Method which I  followed during the migration :

Step 1 :   Go to the flow that you want to migrate, Right Click on the Transfer Rules

                     Additional Functions a Create Transformation

After this go to the Info source and activate it

Now go to the transformation and activate

Step 2:

Now we need to migrate the data source to 7.x

Choose the option With Export – If you choose this option we can roll back the source to 3.x later

Step 3:

Update Rule migration

1. Go to the 3.x Info source update rules a Right click – Additional Functions a Create Transformation

Map the rules and activate, all data flow is in 7.x

If any face this issue please let me know.

Thanks in Advance.