1.Try those areas with just one pass wtg, see if the irritation persists. If not, add in a second pass, wtg. Not everyone needs to go ATG to get a good result. Have you face mapped? (observed which direction the beard actually grows) - you may find that what you think is WTG is actually ATG and vice versa.
2. I'm watching the replies to your question 2 cos like Manuel in Fawlty Towers, I know nothing!
Ainslie
ps. It might be worth re-posting these questions in Shaving Help, cos it kind of gets lost here in the Welcome forum.
Gingerpose