I've uploaded three videos of Bianca, Monica and Steve sempais. Take a look at how you did on June 7th. I slowed down some of it where relevant and left the audio commentary in of tips.The videos and information is for your benefit; don't feel bad about hearing where you can improve.
Specifically, Bianca sempai
the right to left kiriage is noticeably off. I think its because your hands are too far apart, so you end up bending your left elbow which then puts your hands past your tip when you hit the target. It results in the kiriage not happening.
the suihei from right to left. I did some snapshots exactly around where you have difficulty. Here's the sequence:
In the first shot, your tip is horizontal and proper behind you. As you start to move you drop the tip quite a bit and this is where it starts becoming a kiriage. I think what happens is that you raise your left shoulder as you wind up to cut, which tips your sword down.
the commentary on the video says it all.