You made two errors:
1: You did not do a good job of exegesis in 11:15-18. You failed to recognize and understand that the 24 elders were prophesying - foretelling FUTURE Events. You will find judging the dead in chapter 20. What happens at the 7th trumpet is that property (earth) exchanges hands.
2. It is only your wrong opinion that the book is not in chronological order. Sorry, no overlaps.
Axiom on Revelation: ANY theory that must rearrange Revelation to fit - will be proven wrong.
The text below does not say what you are claiming.
Rev 11:15 And the seventh angel sounded; and there were great voices in heaven, saying, The kingdoms of this world are become the kingdoms of our Lord, and of his Christ; and he shall reign for ever and ever.
Rev 11:16 And the four and twenty elders, which sat before God on their seats, fell upon their faces, and worshipped God,
Rev 11:17 Saying, We give thee thanks, O Lord God Almighty, which art, and wast, and art to come; because thou hast taken to thee thy great power, and hast reigned.
Rev 11:18 And the nations were angry, and thy wrath is come, and the time of the dead, that they should be judged, and that thou shouldest give reward unto thy servants the prophets, and to the saints, and them that fear thy name, small and great; and shouldest destroy them which destroy the earth.
Rev 11:19 And the temple of God was opened in heaven, and there was seen in his temple the ark of his testament: and there were lightnings, and voices, and thunderings, and an earthquake, and great hail.
Christ returning as a thief at Armageddon in Revelation 16:15-16 proves the Book of Revelation is not in chronological order.
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