Technically, that is a bug. I haven't made any major changes to the building resource code in a while, so it's probably been there for some time. :P
I have a Mersenne Twister random number generator that I use in some projects and not others that is inclusive - like
Zero Day - and that's probably why the bug is there. I'll likely change it to 2, rebuild the code and upload the new executable with upping the version number as it's not game-breaking.
I'll also think about making Church survivors have a chance to be injured. :)
Thanks for letting me know!