This is a measure from Yann Tiersen's "La Valse D'Amelie". The very first measure of this piece has a 2/4 time signature:
The rest of the measures are like below. Just counting the note values it's equal to 5 quarter notes on bass clef and 6 quarter notes on treble clef. I'm very confused about both how to read this measure and especially how to play the dotted half note.
- What's the time signature for this piece? It doesn't count to 4/4 or 2/4.
- How should the dotted half note A on the treble clef be played with others?
PS. It was suggested I check the post for "rest above a note", but that's doesn't answer any of questions I raised in this post.

