They are numbered for a reason. It describes things that happen in the realm of time. This doesn't mean that all the seal events happen, then all the trumpet events, then all the vial events. I believe the seals, trumpets and vials are all parallel to each other. So, my understanding of the fifth seal agrees with my understanding of the fifth trumpet and fifth vial. But, the seals are numbered for a reason. The seal events happen in chronological order in parallel with the numbered trumpets and numbered vials.
But notice what happens when you reason things in this absurd manner.
Revelation 8:1 ¶And when he had opened the seventh seal, there was silence in heaven about the space of half an hour.
Thus is parallel with the 7th trumpet and 7th vial per what you said.
You clearly and undeniably said ALL seals and ALL trumpets, and ALL vials, run in parallel, keeping in mind there are clearly 7 sets of each, as in, if you are correct---
1) seal 1, trumpet 1, vial 1, are running in parallel
2) seal 2, trumpet 2, vial 2, are running in parallel
3) seal 3, trumpet 3, vial 3, are running in parallel
4) seal 4, trumpet 4, vial 4, are running in parallel
5) seal 5, trumpet 5, vial 5, are running in parallel
6) seal 6, trumpet 6, vial 6, are running in parallel
7) seal 7, trumpet 7, vial 7, are running in parallel
Yet look what follows the half hour silence in heaven per the 7th seal. And it clearly isn't the 7th trumpet. Therefore, it is absurd that the seals, trumpets, and vials, run in parallel. Because if they did, the first trumpet would not be sounding during/after the 7th seal, the 7th trumpet would be sounding.
Revelation 8:1 And when he had opened the seventh seal, there was silence in heaven about the space of half an hour.
2 And I saw the seven angels which stood before God; and to them were given seven trumpets.
3 And another angel came and stood at the altar, having a golden censer; and there was given unto him much incense, that he should offer it with the prayers of all saints upon the golden altar which was before the throne.
4 And the smoke of the incense, which came with the prayers of the saints, ascended up before God out of the angel's hand.
5 And the angel took the censer, and filled it with fire of the altar, and cast it into the earth: and there were voices, and thunderings, and lightnings, and an earthquake.
6 And the seven angels which had the seven trumpets prepared themselves to sound.
7 The first angel sounded, and there followed hail and fire mingled with blood, and they were cast upon the earth: and the third part of trees was burnt up, and all green grass was burnt up.