I'm building an arcology.  Or maybe I'm not.  Or maybe I already built one.  Honestly, it's hard to tell.  Lemme tell you about it.   -----   The first thing I noticed happened as I was swapping back and forth between two of my cities, one of which was supplying the TV's for the arcology's construction, the other of which was supplying the metal and alloy.  The one that was supplying metals and alloys said I was done with metal and TV's, but still needed alloy.  But, when I had the one supplying TV's loaded, it said I had enough metal and alloy and still needed TV's!  "Okay," I thought, "that's an odd sync bug, but it'll probably work itself out once I get the thing built."  So I continued to run the TV-supplying city until I'd gotten it to the point where it said I had enough supplies in all three categories, and it rapidly picked up 300 workers and started building.   "Yay," I thought, "I'm gonna have an arcology!"   That's when things got really weird.  Here's what the arcology site looks like from the three cities I have in the region:   First, the one supplying TV's, from which I built the thing:   Next, the one that supplied metal and alloy:   Finally, a third city in the region, which was uninvolved in the arcology's construction, and isn't connected to the other two cities (or to the arcology site):   WTF?   I chose to just accept the surreal and try to move on with the development of Schrodinger's arcology.  It told me it needed power (as long as I looked at it from City #1), so I plopped another reactor onto my nuclear plant and, after a bit of quitting, reloading, waiting, running at cheetah speed, etc., the game realized that I had plenty of excess power in City #1 and reverted to telling me it needed water (as seen in the first screenshot above).  This seemed a little odd to me, because in fact, I have an enormous excess of water produced by City #2, some of which I sell to City #1 when needed:   ...but the arcology doesn't seem to notice that it's there.  Is this related to the fact that the arcology doesn't appear to be done when I look at it while City #2 is loaded?  Is there any way to check?  Does anything in this game work properly?  Do people ever describe you as "mountainous?"   -----   So, just to summarize (and with a few extra minor bugs that I haven't discussed thrown in for good measure), that's: Megaprojects report needing different amounts of resources depending on which city you view them from. Finishing a megaproject with one city loaded does not guarantee that it will count as finished for other cities in the region. Megaprojects which require resources do not necessarily notice when those resources are available from cities in the region. Bonus Bug #1:  The missions that are generated when you start sending resources to a megaproject don't seem to get checked off at the same time as you actually meet the resource goals for them (in my case, I still had a lot of TV's to send when the big green check mark appeared and the mission went away...but it did disable resource sending, which I had to reactivate manually). Bonus Bug #2:  Megaprojects don't seem to consistently register having received resources without reloading the region. Bonus Bug #3:  As far as I can tell, none of my cities are actually receiving any extra workers/shoppers/students. -----   tl;dr:  WTF?   Please share your similar experiences, thoughts, advice for rectifying the situation, shared frustration, sympathies, and rage.