why is "Matthias, the son of Theophilus" listed twice

[Steven Avery]

http://penelope.uchicago.edu/josephus/ant-20.html
https://books.google.com/books?id=NStdAAAAcAAJ&pg=PA543

1. Ananelus.
2. Aristobulus.
3. Jesus, the son of Fabus.
4. Simon, the son of Boethus.
5. Matthias, the son of Theophilus.
6. Joazar, the son of Boethus.
7. Eleazar, the son of Boethus.
8. Jesus, the son of Sie.
9. [Annas, or] Ananus, the son of Seth.
10. Ismael, the son of Fabus.
11. Eleazar, the son of Ananus.
12. Simon, the son of Camithus.
13. Josephus Caiaphas, the son-in-law to Ananus.
14. Jonathan, the son of Ananus.
15. Theophilus, his brother, and son of Ananus.
16. Simon, the son of Boethus.
17. Matthias, the brother of Jonathan, and son of Ananus.
18. Aljoneus.
19. Josephus, the son of Camydus.
20. Ananias, the son of Nebedeus.
21. Jonathan.
22. Ismael, the son of Fabi.
23. Joseph Cabi, the son of Simon.
24. Ananus, the son of Ananus.
25. Jesus, the son of Damneus.
26. Jesus, the son of Gamaliel.
27. Matthias, the son of Theophilus.
28. Phannias, the son of Samuel.

 

[Steven Avery]

The Antiquities of the Jews, 17.78

Flavius Josephus translated by William Whiston
78The high priest’s daughter also, who was the king’s wife, was accused to have been conscious of all this, and had resolved to conceal it; for which reason Herod divorced her, and blotted her son out of his testament, wherein he had been mentioned as one that was to reign after him; and he took the high priesthood away from his father-in-law, Simeon the son of Boethus, and appointed Matthias the son of Theophilus, who was born at Jerusalem, to be high priest in his room.

 

[Steven Avery]

Matthias, the son of Theophilus

In the list of the last 28 high priests, he is listed twice.

Antiquities of the Jews - William Whiston
http://penelope.uchicago.edu/josephus/ant-20.html
https://books.google.com/books?id=NStdAAAAcAAJ&pg=PA543

Once #5, long before Theophilus.

Theophilus is #15 (this is c. AD 40-41 and he Luke's Prologue is written for him)

Then again #27, long after Theophilus, 20+ years later.

Explanation?
Two Theophilus?
Did his son have two high priesthoods 30-40 years apart?

Thanks!

Horne
https://books.google.com/books?id=iPopAQAAIAAJ&pg=PA286

John Barr (1875)
https://books.google.com/books?id=MdjcEAAAQBAJ&pg=PA267

https://books.google.com/books?id=MxidEAAAQBAJ&pg=PA467

"Matthias, the son of Theophilus" "high priest: - Google Search