rubs dont sound fun! maybe it was because you were riding so long? was anything on the saddle different? could you feel it hurting while you were riding?
breeches typically have velcro at the bottom and are a little more tight fitting around your legs, used for when you wear tall boots or paddock boots and half chaps. jodphers have straps on the bottom that go around the bottom of your paddock boot. there a little more loose fitting and fit the same all down your leg. typically you only wear jodphers if your under the age of about 12.
i really like tailored sportmans breeches, but there super expensive. ariats are really nice too. i also really like riding tights, kerrits are my first choice, they fit really nice, are durable, super comfy, and cheap!