It likely means that bond has not been posted. However, I would have to see the case to be sure.

You can still be convicted of driving while impaired despite your low BAC. You should absolutely talk to qualified counsel as it sounds like you...

Is writing a letter to children (not able to read yet) a violation of a protection order?

It depends on the terms of the order, but it is likely a violation. You should make this known to the appropriate attorney or victim's advocate.