The Roberts house was planned for Berkeley Square, and, if built there by that family as early as the date on the Corbett plans (1910), must have been sold fairly soon afterwards. By the '20s, the Robertses were at 2151 W. 21st St., a house that still stands and looks very similar in form to the Corbett design (btw, the freeway is now literally across the street from the 21st St. house). There is a photograph of the Roberts house as built, labeled Berkeley Square and "C. Wesley Roberts" (a typo? The father of J. Wesley?), here:
http://books.google.com/books?id=MG4...hitect&f=false
(Scroll to pp 467/468-- I don't have the expertise to get the pic and the floor plan posted here--can you, gs?)
The Roberts house, if indeed built on Berkeley Square, possibly became known later by one of a number of names of other early owners, possibly Reilley or Bacon, who, among others, owned masonry houses on the street.
As for the numbering--it looks like early on, lot numbers may have been used for addresses. Lot 26, for instance, was eventually addressed as #6; lot 22 became #14. It seems that Baist maps, which have the lot numbers prominently drawn, were consulted by various editors even into the 20s, resulting in the confusion. The Phillips house, #4, was built across three lots at the southeast corner of the square, originally numbered 28, 29, and 30, which would have corresponded with address numbers 2, 4, and 6. (The original 30 lots became 20, several owners taking multiple lots and altering lot lines.)