Hey Shawski!
Following the Flex Plan, you get to use those 35 Weekly Flex Points any where and any way that you want. You can certainly add 5 points to each day. You can absolutely save them for one day that you're going to eat out or eat a little extra. They're flexible!
If you're following the plan as it is
now then don't worry about the old points height/weight charts & ranges. Forget them. Follow the information given to you now.
Enjoy your 26 Daily Points. Add in the Flex Points when needed, as explained above. Just remember to retake your points quiz every time you get into a new "decade". For example: I'm in the 230's now. When I get into the 220's I will retake the quiz to reaccess my daily points.
Any other questions, just make sure to keep asking until it makes sense!