6 newbie questions about Forge

Hey guys,
I've been using forge for a few months now. First things first, it's a fantastic program. I give major kudos to all of those who put in the hard work in constructing it. As a person who doesn't have the time to go to many FNM and drafts, nor the income (recent college graduate) to continually "keep up" with Magic, Forge has been a great stand in. I love being able to play with cards both newly released and of yesteryear that I might never be able to otherwise. I used to do solely drafts but recently I got into quest mode. Anywho, I have a few easy questions.
1) When in quest mode, what is the biggest way to earn credits? I see that a lot of things cost thousands of them. Winning a match right now (vs hard decks) gives less than a hundred or so. Is it mainly by selling cards back from boosters? I haven't done a challenge yet; maybe that has a bigger payout. Also, I've noticed that the percentage selling value for my cards is changing. Is this because of winning games or just merely competing in a set number of them? Maybe I ought to start spending on the "Estates" in the bazaar.
2) When an attacking creature is blocked by multiple blockers and the screen comes up to assign blocking order, is there an indication to which creature is being blocked? If memory serves best I don't think the log shows who is blocking whom while that screen is up, so when I swing with multiple fatties I have to best guess which creature is being blocked. I might be wrong though. I'll check soon.
3) Of the 55 boosters I've opened after matches, I've gotten one mythic (Bonfire of the Damned). I think in actual Magic boosters the chance of a mythic is one in eight. Is this intentional or have I had horrible luck? Also, I occasional win an extra rare. Without the "Lucky Coin", what is the actual percentage of winning the extra? Does the extra have a chance to be a mythic?
4) Sometimes the spell shop has less cards to buy and sometimes it has more. Is this random or is it because I have or have not bought cards since a match ago?
5) I had Forge download all the card images of all the sets, but once in a blue moon there will be no card image for a particular card. If I click to download again will it do all the card images again or just the ones that aren't showing up?
6) When a bug is reported and one of the developers say it's now fixed, does that mean the bug will be fixed in time for the next version or can you download the current version from the provided link without said bug?
Thanks a lot guys!
I've been using forge for a few months now. First things first, it's a fantastic program. I give major kudos to all of those who put in the hard work in constructing it. As a person who doesn't have the time to go to many FNM and drafts, nor the income (recent college graduate) to continually "keep up" with Magic, Forge has been a great stand in. I love being able to play with cards both newly released and of yesteryear that I might never be able to otherwise. I used to do solely drafts but recently I got into quest mode. Anywho, I have a few easy questions.
1) When in quest mode, what is the biggest way to earn credits? I see that a lot of things cost thousands of them. Winning a match right now (vs hard decks) gives less than a hundred or so. Is it mainly by selling cards back from boosters? I haven't done a challenge yet; maybe that has a bigger payout. Also, I've noticed that the percentage selling value for my cards is changing. Is this because of winning games or just merely competing in a set number of them? Maybe I ought to start spending on the "Estates" in the bazaar.
2) When an attacking creature is blocked by multiple blockers and the screen comes up to assign blocking order, is there an indication to which creature is being blocked? If memory serves best I don't think the log shows who is blocking whom while that screen is up, so when I swing with multiple fatties I have to best guess which creature is being blocked. I might be wrong though. I'll check soon.
3) Of the 55 boosters I've opened after matches, I've gotten one mythic (Bonfire of the Damned). I think in actual Magic boosters the chance of a mythic is one in eight. Is this intentional or have I had horrible luck? Also, I occasional win an extra rare. Without the "Lucky Coin", what is the actual percentage of winning the extra? Does the extra have a chance to be a mythic?
4) Sometimes the spell shop has less cards to buy and sometimes it has more. Is this random or is it because I have or have not bought cards since a match ago?
5) I had Forge download all the card images of all the sets, but once in a blue moon there will be no card image for a particular card. If I click to download again will it do all the card images again or just the ones that aren't showing up?
6) When a bug is reported and one of the developers say it's now fixed, does that mean the bug will be fixed in time for the next version or can you download the current version from the provided link without said bug?
Thanks a lot guys!