Erratic chart?

Scarlett
Ladies any ideas? This is my first month charting and it seems to be all over the place? I got a steady smiling positive opk on day 10 which is why the chart says I ovulated on day 10 but the temps don't agree? And of course if it wasn't until day 16 and hubby has been away for a week then we totally missed the best days 😡😡😡