Shooting through the bounce seemed like a good idea. With the drop into the 30s, it would be safest if you took a full 0.25u reduction although it looks to me like you've been shaving the dose when you reduce.
I'd like to propose you think about two slightly different options regarding managing Ivana's numbers. One option is to hold the dose if she drops into the 40 - 50 range on three separate days. After three drops, you reduce the dose. The other alternative is to use food to prevent her from earning a reduction. You already test a good deal so it is unlikely you would need to do much more than you're already doing. The idea behind preventing a reduction is to try your best to keep Ivana in a lower range of numbers so the curve flattens out. Ideally, you'd want blue pre-shots and as much green in the middle as you can get. Today, for example, I would have gotten a test at PM +3 (because with perfect hindsight, her numbers were dropping fast) since given her pre-shot number and your +2, her numbers were dropping and you would have started giving HC at +3. This might have avoided the dose reduction. Jill had suggested this strategy with Gabby and it was very helpful in getting her numbers in a lower range overall.