Dancing Hoskuld
Deity
Of course they are. The fields with the -1 would allow you to build more than one of the building at each level. Hopefully you have not made it so that only one grainery can be built in your nation. I don't think that is what that tag is for though.Apparently ALL buildings with iExtraPlayerInstances of -1 were either regular or special buildings.
I removed this because ordinances weren't working (<iExtraPlayerInstances>-1<iExtraPlayerInstances> makes wonders unbuildable) - I converted ordinances to national wonders (were special buildings), they have cost of Judge.
It was used only in main assets and Faustmouse module.
<iExtraPlayerInstances>-1<iExtraPlayerInstances> should never be used.
I cleaned up mod, so I have default pedia. It normally opened wonders page.
Spoiler :
I guess file was corrupted @strategyonly that is you need to do cleanup.
At one stage, and still in vanilla, it was possible to have a Great Wonder that other nations could "steal" eg tallest building. There was only one active but it could always be built by someone else replacing the one that existed. It was used for that.
Isn't it used so that you can move a building from one city to another, mostly the palace when you want to improve your "distance from palace"?