So, I am doing the final earth level, and I finished the Greenland bonus, which is a mercenary camp, however, when I went to purchase my shiny new mercs, the camp claimed to be out before I even purchased any. What's going on?

Sorry about that. This is already fixed in the latest version of the app, so once you start a new level you won't see it again.

The good news is that it doesn't really hurt you. The number of mercenaries is fixed relative to the number of armies needed to conquer the entire map, so if one mercenary camp doesn't have armies it just means all the other mercenary camps have higher armies to make up for it.

Ok, don't know if this was also fixed, but I've experienced an issue where if I purchase at least 90% of the mercs, it claims that I have purchased all of them.

If you're referring to what I'm thinking of, that happens frequently, but I believe it's closer to 99.x%, and I suspect it's just a difference in rounding.

So if merc camp has 220B quantity, you often can't buy a full 220B as it shows up in the list under the Mercenary Camps list, but can only buy 219B. So let's say the # of mercs are 219.6B, it seems that the list shows it as 220B but the purchase dialog shows it as 219B, but you've actually bought 100% of what's actually present in the camp at this point.

For Example, once, after I had purchased several batches of mercs, the merc camp said it had 1M left and I purchased 3K, which apparently exhausted the supply.