OK I'm relatively new here and I have, since joining, not been into reputation. I prefer thanking posters for thoughtful ideas. I have repped 9 people, one negatively, more for a pattern of well thought out, cogent posts than for individual instances. My problem is, it seems that I can not rep a person a second time. I get a message that I must spread rep around before repping a certain person again. What are the rules on this? I may have to go on a thanking binge soon if I can't resolve this.