The Hillson and Nixon book (which has been noted here in other Small Queen threads) says "The "one dot-two dot-three dot" stages of the plate have been studied extensively." There is a bit other discussion of the "two-dot" examples throughout the chapter on the Six Cents value.
Perhaps a search of the BNA Topics journals (see their website) would yield articles on these "two-dot" and "three-dot" stamps?
In another thread I mentioned that the Nixon SQ collection was being auctioned. I received the Eastern Auctions catalogue the other day. Lot 240 shows a 6c strip of 3 with the "2 dot stage" while lot 241 shows the "3 dot stage" strip of 3.
I also have a 12.5 cent large queen with 3 dots called balloon dot vaeiety. If I red correctly this occurs for 2 possible resons-1 actual plate bounce(flapping) causing double dot close together or with wear they would realign and reposition things adding a second or third dot intentionally for guidance. The second reason would beter explain your examples as they look diliberate . However when this was done if my memory serves it was only done where needed on the plate and not to every stamp (unless needed). Pretty sure its more likley to find bounce dots on edges and corners of plates where there would be movement. Qucily learing with each subtle difference I find especially on the sm queens its important to note each one even if just in a stock book. All these subtelties have history and the ubitrade catalog only list a very small percentage of the goodies to be found.
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