During manual note entry, I frequently get a situation where SC fails to enter the requested note length. First attached picture shows an example. You'll see that a quaver has been selected, I then type "f" expecting a quaver F note, but got a crochet. Yet the quaver selection is still high-lighted. After correcting that note length, I then used the right arrow to move to the 3rd beat of the bar, but as I was unsure exactly where I'd got to, I clicked in the "3" in the 4-beat window as shown by my cursor position in my 2nd attachment. As I clicked on "3", the last note I had edited jumped up to a high "C" as shown. This is one example of erratic mis-positioning of notes experienced in SC studio.