There's a reason why the Twintig site has posted pictures of ALL the numbers in the "11 Found" link. I think there must be a way to unravel their designs for a clue to the 12.
The 4 corresponded to clues from the 1st floor.
The 1 corresponded to clues from the 4th floor.
The yellow items on 4th floor correspond to North South East West similar to a compass and so suggests that the 1st floor's digit aligns with the 4th floor.
1st floor has a lot of HISTORICAL artifact type things (similar to 13th, which was more precisely an ART theme). I believe the digit is Inca. The Inca were actively expanding in year 1522 and their civilization covered an expanse stretching as far as Columbia in the North and Chile in the South. In this historical way, the "1" corresponds to the 1st floor.
I will have to look at the designs and your ideas. I have often wondered why certain numbers would designed a certain way. You would think that there is some reason...
Khroniker No.1 is an Incan relic of a distant past. Probably the second oldest of the numbers, No.12 being the oldest.
I wonder if the No.1 is intended to be a harpoon. That would make it go along more with the Red Whale clue.
Here's something I worked on a couple of weeks ago, derived by drawing a straight line through some oddly-placed items in Pupkin/Dodge's apartment. It had taken me a long time to register that the thing on top of the reel-to-reel tape player in the bathroom was probably an old camera. If Dodge took the camera from the shelf over the frozen timepieces in Ida's apartment, he may have deliberately placed it in the first floor apartment to complete the clue he needed to identify the "stash spot" he was planning to use for the twelve.
Camera + Lighthouse + Snowman + Ladder =
Marshmallow decode hunting areas.
Marshmallow Unearth A Decode Sign
Unearth Dodge Case in Marshmallow
Marshmallow Unearth Decagon Side
Underneath Marshmallow is GA code
If this collection of aligned items is relevant to the solution for the twelve, it uses the toilets = T.S. Eliot hints (in the sense that the camera is found in the toilet room), the "numbers sleep" hints on the back cover and the Twintig site (because the lighthouse and snowman are on the bed) and the "written in white on black" phrase (because the ladder is sketched on the chalkboard). And, of course, the ubiquitous marshmallow hints. I am now working on a theory, however, that the saltine and marshmallow hints may be sometimes intended to tell us which phrases qualify to be anagrams: the solution to the anagram doesn't have to include the word "marshmallow," but the phrase can be ignored if it does not contain the requisite letters. Possibly. Or not.
I'm a big supporter of anagrams in the form of 1-3 words, but I lose confidence after that, with larger strings. I'm set on a series of words that are not as random as they seem. Marshmallow is an attention getter. L+adders, L+bows seem like rich words. Adders could be snakes, but also could be a reference to addition. Bows has some interesting possibilities too. I'm in favor of the quantum physics angle with Bose, a guy from Calcutta India.