Amjuarez has just commented on both issues. The #37 is a bug which is going to be fixed within a couple of hours. And #36 is actually a change in behavior:
We should have provided a more extensive explanation on this one. Actually, it's not a bug, but a usability fix that was required for Bytecoin Wallet.
Previously, "balance" was a sum of pending balance and unlocked balance. As of version 1.0.3 this behavior was fixed so that balance corresponds to pending balance. Note that in GUI wallet all three balances are available.
We're going to rename this field to avoid further confusion. The patch is being processed at the moment.
And finally, regarding the boost issues, you're totally correct. We will update the readme file. Thank you!