Hi Mr.Tom,

Please note that you cannot select multiple network object groups for policies. If you want to apply same bandwidth policy for multiple network objects I suggest you to create replicate policies for each network object group separately.

Please clear me if I misunderstood your question.

Thanks and regards,
Muhammad Talha Siddiqui

Dear Tom,

I understand your issue, Please note that Source can be multiple but logically destination is single group. That is why you can't select multiple network objects.
For your issue you don't need to create again. Just copy IP group to create a new networks object group.
To replicate policies there is also an option to mirror policies. Try this and change objects in policies.