This is one thread of an entire board. Numbering is board-wide, not just per-thread.
Example:
>>4344339 is missing between posts on this thread, but is still there, just in a different thread.
Neon Revolt also just posted about this.
https://www.neonrevolt.com/2018/12/17/jrsenatoranon-heralds-legal-revelations-for-qresearchers-advent-of-the-qmarch-qanon-greatawakening-neonrevolt/