Create Key signature: bugs?

2.0.3 on Win 7/10

The following may be bugs in the Create Key Signature section:

1. If you create a key sig in this dialogue, when applied to the score, the signature also appears on tablature staves.

Expected behaviour: The key sig should appear on pitched staves only.

2. The accidental symbols in the palette in the "Create Key Signature" section can be dragged into the key sig library to the left, or even applied to notes in the score itself.

Expected behaviour: Palette accidentals in the "Create Key Signature" section should only function within this section.

3, The palette brackets symbol cannot be applied in the "Create Key Signature" section.

Expected behaviour: Not sure.