Posing eh!!!
yes when you get to 70 you stop earning Points.
when leveling there is no "Correct" allocation of points, as this depends on your playing style, however there are allocations better than others.
remember you can always re do your talents if you feel that you want to change, this will cost up to 50g depending on how many times you want to respec.
when lvling you want to look at you want to balance dmg output with survivability.
im not the best person with rogues, i always look at
www.wowwiki.com for suggestions.
I personally dont like telling people that their talent points are wrong as this is your choice and whatever suits you is always best.