Awwww, I used to love this thread when I was TTC.
Congrats on the twins Peace! What a handful, your brood is jumping to 4!
I'm going to try my hand at chart interpretation even though I'm sooo rusty. I miss charting, haven't seen AF since Dec. 2009! Never thought I'd say this but I kind of miss the
!
Butterfly-It looks like there is fertile CM on Day 16, which means that FF won't call O on Day 15. Also, the Day 16 temp is not really that high in relation to your pre-O temps. A case could be made for O on Day 16, since it's the last day of fertile CM and there is a slight rise after, but I think Day 17 is right since you see the really BIG rise the next day. The cover line does seem a little high in relation to the pre-O temps, but it's because O is on Day 17 and the temp is higher. If O was Day 16 your coverline would drop to about 97.8. But if you look at your post-O temps, this coverline looks fine, and you have a nice dip at 7DPO, maybe implantation?
If I were you I wouldnt worry, the coverline doesn't actually mean anything, it's just a visual to help you see the split. And whether O was Day 16 or 17, you have BD covered really well, so just hang on for the rest of the TWW and hopefully there will be some good news. IMHO, your chart is looking great,
good luck!