bezo, I think Karle means that Pennsylvania had an identical pilothouse (or whatever it was) to the one on New Mexico. Since New Mexico was selected as Pacific Fleet flagship in that same time period I'm going to guess that one of those levels is in fact a flag bridge.
Karle, Arizona didn't have that additional bridge level. I'm betting that you saw that in a photo on Navsource. If so, they misidentified the ship in that photo. The ship in that (those) photo(s) would be Pennsylvania.
Dave, I hope that in addition to the 1918 and 1933 versions, you also do a mid-1920's version of the ship (or ships) after they received additional, enclosed structures on the fore and mainmasts (as shown on the photo of Mississippi that I posted earlier). I believe that these might be enclosed spotting tops, though I'm not absolutely certain. Whatever they are, they become an easy way to identify individual ships in the class as each ship had them mounted at a different level. Mississippi had the structure mounted entirely below the top of the funnel (the roof of the structure was below the top of the funnel). Idaho had the roof of her structure slightly above the level of the top of the funnel and New Mexico's entire structure was mounted higher than the funnel due to the extra bridge level (entirely above the funnel). I just can't seem to find out when those levels were added.
Should you should decide to accept this mission.
One last thing. If you do decide to make the additional drawing, don't use the Navsource photo of New Mexico dated 1921 showing the ship off San Pedro, CA. They incorrectly identified that ship. Its actually Mississippi. As I said, you can tell from the height of the tops.