As the Reviewer for this cache, just a couple of points to set the record straight.
When I did this 5/5 (just after it had been published) the GZ was in another spot, hence my initial query to the CO as I incorrectly believed there had been a genuine mistake with the provision of the final co-ords to Groundspeak. The CO had in fact changed the GZ due to muggles and noted that information on the cache page. Had I looked more closely at the cache notes I would have identified that. The GZ as provided to Groundspeak is correct.
What this correspondent has sighted - note not found, is in fact the fifth way point in the Multi. As there are calculations associated with establishing this way point the CO has kindly provided a facility for seekers to check they have calculated correctly for this way point.
When they eventually reach the container they have sighted (hence the T5 rating) they will not find a log but a document indicating what the actual GZ co-ords are.
Going from the cache logs, they are not the first team to have been caught by this devious ploy. There are a number of Multi and Mystery caches around that have the same twist - Bendigo is renowned for them!