The conventional order of clef, key and time signature changes and/or cautionary markings may be different from usual at a repeat bar line. In some cases one may need two markings, for example a cautionary clef change before the bar line and a different clef change after it, as at the end of this example:
Also, a style of engraving that was in use at least until the start of the 20th century always begins a grand staff with treble and bass clefs, even if this requires a clef change before the first note of the score, as here:
Current notation programs either can’t handle two events of the same type at the same rhythmical position, and/or can’t automatically handle a combination of these notations in an “unusual” order.
How will Dorico deal with situations like this?
(Disclaimer: the fact that Daniels former employers seem to be getting tied in knots implementing this right now is pure coincidence - their competitors don’t handle it well either!)