I don't see your chart--
My BBT is always pretty high after O and until the day before AF comes. But that doesn't mean that your BBT won't STAY up and you will be PG! With my last two pregnancies, my BBT went WAY up around 10-11 DPO (like from 98.5-99.6). That is why I tested when I did. Haven't had that happen since I have been trying this time around (since August).
Good luck and lots of baby dust to you!
Why are there so many questionable temps, though?
Have you tried looking at other people's charts in the gallery on FF? you can select 'charts like mine' if you are a VIP member; this will give you an idea of what the outcomes were for other women with rising BBT at 11dpo.