Hi

Did you recently come off of hormonal birth control (pill, patch, etc)? If so, then that can make your chart pretty crazy for a while. Also, cervical position is a hard sign to really judge, so although its great to check, its too vague to rely on too much.
Also, some people have to be really exact on what time they temp as even 15 minutes can alter interpretation (although some others may be able to be less exact and still have a clear shift). If you are waking up at different times, try setting your alarm really early when you know you'd rarely wake up, then temp and go back to sleep. You can always record the temp later. This worked really well for me (I set it for 5am when I usually wake up around 7:00).
Also, are you using Fertility Friend website to log in your temps? If not, its a great tool and you can even put links to your chart in your signature so when you ask for charting help everyone will be able to see your chart and help you better.
I don't know if I've been any help, but I just thought I'd share my experiences for what their worth. Good luck & happy temping!