
Make sure the text & bullet styles are you want. From the View tab, in the Master views group, choose Slide Master or Hold your Shift key and click on the Normal icon on the Status bar (at the bottom of the window).What you need to do is clear your slides so the objects & text pick-up the Master style. The other answer is to apply a Design but because the Design becomes your Slide Master you may have the same problem especially with bullets. Individual slide changes can "over-ride" the master styles. The obvious answer is to adjust your Master and all the slides will follow but that isn't always the case.

This mainly happens if someone changes individual slides or if you import slides that have different styles. You may have Font problems with your slides, where the type, size & colour and sometimes bullet points are different on some or all the slides.
