Published Project - Text does not appear in accordance with project timeline

I have just published my captivate 8 project. On two of my slides the text is not showing up at the right time. The first bullet point on the slide for example will show up when the slide begins, but the rest of them, instead of showing up at the time set on the timeline they show up a minute later after the slide audio has finished. Does anyone know why this is happening and how to fix it. I have republished the entire project on numerous occasions and each time it happens but not necessarily to the same slide. It seems to just pick a slide at random and each published version has the same problem on a different slide?