Well, not "every time" - at least not every post. The last post with the highest vin was #553 - vin 8225. I think that is the highest vin. I didn't look back a lot of pages to check for higher. It will be interesting to see how many more posts until the next highest vin.
Actually, the post immediately before yours is a new record, complete with a picture of the VIN plate.
Ryan McCaffrey of Ride the Lightning caught a picture of a prototype's VIN, #8370. Mod Edit: See post #8370 above
Disappointing at how small of an increase that is over the prior record, though, given it's been 3 weeks now since we saw 8230... surely a 9000 or 10000 VIN should have been spotted by now? I feel like Tesla must have shut down production for several weeks in February...