Additional Land cards
While playing against players using Azusa, Dryad of the Ilysian Grove, and Wayward Swordtooth there appears to be an issue of the game not correctly calculating the total number of lands allowed to be played when there are multiple of these of effects. I am unsure if spells that provide this effect also cause the bug but I have played against people and if they have two of these static effects in play have seen them be able to put anywhere from one to five additional lands over how many they should have been able to play. For example if they have Azusa (+2) and Dryad (+1) together with the normal land drop they should have 4 total land drops. A player with those cards in play (plus Ramunap Excavator in play and Ghost Quarter in graveyard) was able to play Ghost Quarter against me six times in one turn.