Also if you could send the app to ezra@interactstudios.com so we can check to see what is wrong with it.

The difference is: 
a) If you choose to Curl up-down, when you'll go to prev page the page will turn with curl down effect. If you go to the next page the page will turn with curl up effect.
b) If you choose to Curl up or down, this effect will be the same even if you turn the prev or next page.

Did you try remaking the animations? I create a sample app and everything worked great:
328 - Chained frame animations.zip

We were able to recreate this problem. There are some bugs regarding Drag-Erase which will be fixed as soon as possible. Thank you for the feedback.

Are you using the latest version of the builder? I tried to recreate this but the font size didn't rescale automatically.

I tried to recreate this but the intersection is working as it should. You can try instead of invisible shapes you can add a new graphical element and leave it without an image assigned to it.
Let me know if you need a sample app for this.

We were able to recreate this and we are working to fix it. Thank you for the feedback.

Instead of invisible shapes you can add a new graphical element and leave it without an image assigned to it.

Yes there are default page turn elements in the corner of the pagewhen you view you app in InteractMode as shown in the image below:

Did you test it in the latest InteractPlayer version?