These are known as stickings. Use only one row of stickings at a time.
Depending on context, a repeat sign as well as a set of alternate stickings could mean either to play one sticking and then switch to the other on the second time, or to choose a sticking but use the same sticking throughout. Your no. 8 example, for instance offers a basic alternating sticking, but as a second choice, you can play it as flam-a-diddles, which is a hybrid rudiment combining a flam with a paradiddle. A paradiddle is the sticking rlrr or lrll.
Check out the Vic Firth website as one resource. I also plan to add some percussion content to my website in the coming weeks.