Mana left to play

[nantuko84]

1. I have 2 Swamps and 1 Forest on battefield
2. I cast Grizzly Bears ( ). UI says "Mana left to play: 1 G" - it's ok
3. I tap Swamp: UI still says "Mana left to play: 1 G" - shouldn't it be just G?

next:
1. Cast any spell (why not again Grizzly Bears)
2. Tap two Swamps for mana
3. Press cancel, Swamp untaps, but UI shows two colorless mana in your mana pool.

[silly freak]

first issue:
I will fix that. It happens because LM detects that some colored mana is missing and doesn't even try colorless. this is clearly misleading

second issue:
I hope the mana was black? the mana pool labels were not yet changed to PropertyChangeListeners, so they are not updated when you cancel. The mana pool is still correct; try doing it again and you will see that the next update restores the correct nujmber and doesn't add to 3