I think you're missing the point of my post. Assuming you submit the new cache and archive the existing cache in the same day. If there's a lurker who has submitted a cache at your location earlier and just standing by, they'll get your location, because you just created the replacement and he submitted his earlier, so he's ahead of you in the queue.
HC - I've had several I had been working on over the years have that happen. Surprised it took so long, too.
Thot - The easy way for this to submit your new cache at the same location and then archive the old. Your new cache is already in queue when you archive it (even if minutes before) and any lurker will have a submission in queue after yours. Never had an issue.
Slightly off topic, I had an unpublished puzzle cache from 2009 that I built just to put trackables in. I never intended to submit it for review (though it would be fun to publish a brand new cache today with a GC code that started with GC22), so it just sat there. Well, about 10 days ago, Groundspeak archived it. Their log stated: This old, unpublished cache has been archived as part of site maintenance and database clean-up. You are not required to take action. If you are working on a new cache, create a new listing and submit it for review. Should you prefer to use this listing, contact your local reviewer to request unarchival. See [this Help Center article] http://support.groundspeak.com/index.php?pg=kb.page&id=200 to identify the reviewer for your area. In the future, please work to submit cache pages for review within three months of creation. If you are working on a complex cache, or are waiting on permission, communicate your progress by posting regular reviewer notes to unsubmitted listings. Submissions older than six months may be automatically archived.
It doesn't really matter to me because my trackables can sit in an archived cache was well as an unpublished one. I just thought it was interesting that it took them 7 years to decide they needed to do site maintenance and database clean-up. https://coord.info/GC22E34
You learn something new all the time. If I understand this correctly, you can submit a new cache at the location of an existing cache and wait. If/when the existing cache is archived you're submission is first in line to take the location. I nearly stumbled into this while converting my existing traditional to a multi. In order to get the multi approved I'll have to archive the traditional when submitting the multi. With a lurker waiting, like I just explained, he'd be first in line and take my location.
Apparently there's an unspecified limit to the time you can lurk. Typically somewhere around a month. I guess it's at the discretion of the approver.
I can load caches as a GPX file and they show up on the screen as geocaches with the correct icon -- trad, multi, puzzle, etc. Cache description, hints and recent logs are available. The Montana holds up to 15,000 caches (though I seldom put over 8-9,000 in mine). If necessary, I can switch from Automobile driving mode to geocaching mode and use it outside of the vehicle to navigate to the cache. It works pretty much like an Oregon 550 in that regard. You can even mark caches as found, add field notes and upload to GC.com later on, if you want. It comes with a rechargeable battery, but you can take it out and install 3 AA's if you need to.
Doesn't accept GGZ files like the Oregon 650 or the 64s. Firmware can be glitchy. Mine will sometime just shut down when I try to navigate to a cache and it has trouble calculating a route. When I load caches on it, I have to boot it up and make sure they "took" (sometimes the file is in there but the caches just don't show up on the screen). It's bulky and the screen is rather small and low-res for the size of the unit, IMHO.
Kirbydox has the newest Montana 680T, which has 8 gig of memory and a higher mega-pixel camera than my 650T (I never use the camera anyway).