Both are kind of hard to work around- I suppose for the next make it smaller and only appear when the text is finished, but in the way you're describing, with how the engine works, I'd have to take a screenshot of each and every textbox with all the dialogue, program it in to show that if it's prematurely skipped, and repeat that... 139 times. Unfortunately one of the major downsides of Scratch is how utterly jank some things tend to be.
As for the borbs stacking, also hard to go around but also semi-intentional. Except for stage 2. For whatever reason the game is more inclined to put Mystia at the bottom of the screen, causing massive stacks to form. Somehow harder than stage 3 in part to this.