First of all you should not amend until the first return is done processing and you paid the tax due. Then the amended return is only for the difference you owe or get back. You still owe the original tax due. Amended return are taking a long time to process. Especially mailed ones. They probably haven't opened it yet. Pay the tax due and wait for them to process the amended return. Do not file it again.
Check the amended return line 16. Does it show the original tax due? That assumes you paid it. Go by the actual 1040X. Line 18 should be your original refund amount and line 22 should be your additional refund. If you paid on your original return it will be on line 16. If there is an amount owed with the amendment, it will be on line 20.
