find two marble feature

I've posted or seen posted about this before, mostly thinking it was just an annoying graphics glitch, but I've noticed today that it actually goes further.
The bug of `the second marble' find not showing up unless you refresh was bad enough when it cost you a wasted geo search, but I've discovered two addition effects which go beyond just the graphics and makes this a genuine bug:
a) If the deposit is not showing the mason does not work it ( I've clicked on the work yard and his pathing goes to a deposit much further away, but on refresh he immediately goes to the now showing deposit.
b) If the neighbouring deposit is found but not showing ( as happened in sector three today ) and then the deposit runs out, the two deposits appear seconds later with 100 marble in the just expired deposit and 240 marble in the found but hidden deposit.