1. If your announcement title is long, it will not appeared on same line. So, we recommend you to place the short title for the announcement post. That would be only the solution.
2. In case of Custom Slide, there is only 5 slider options. If you need more slide than the five, you need to follow the parent/child page method. Of you can use the category selection method for the slider. If you need more slide in case of custom slide, you need to customize the theme because there is no any such options available on theme. Check this post for making the slider on based on parent/child page. You can take a look on this video as well.
3. Sometimes this issues is arise due to the JS conflicts. Kindly check the console errors. If you seemed errors there, it may be the reason.
Thank you so much for doing business with us. We are very glad to provide you the best support as far as possible.