in reverse order...
Claire, unfortunately it does look like the missing temps have screwed up the FF programme. Problem is, it doesn't know whether those missing temps were above 36.05 (roughly where I'd put your coverline atm) or below. If you'd had a temp of 36.1 on CD11, for example (not beyond the realms of possibility!), then CD13 wouldn't be above the coverline. Leave it on OPK method for the moment, it's all you can do. You can try switching it back in a few days, assuming your temps stay up high and you don't have any more fertile fluids/+OPKs. The ov line, as far as I know, will always be in the middle of the square, not on a line between two dates. So FF has to decide whether it's 12 or 13 - it cannot try to guesstimate the approx hour of ov. Generally, it will favour the later day.
Mildly, glad you know what's good for you!
I certainly shall be stalking!
Bagpuss - your temps and what you've said about the spotting make me think that the first days of this cycle were actually part of the luteal phase of the last. There's such a dramatic drop from the high temps on Friday morning... I think the general guideline is that if you can get by with a pantyliner, and it's not red, it counts as spotting (even if it would be more accurate to describe it as 'patching'! the important thing is it's not 'flow') and is part of the previous cycle; if you need a tampon/towel and/or it's red, it's menses, whether light, medium or heavy. Therefore, from what you've said, then yes, I'd put Thursday as first day of AF/cycle.
I had to do something similar with my first month's chart - was so eager to start I didn't read the guidelines properly
. What you'll have to do is 1) change Mon, Tue and Wed to 'spotting', then 2) on your chart page, click on the 'cycles' tab on the left, then click on 'change cycle start date'. That way, you'll still keep the Mon, Tues and Wed as a previous cycle, and you'll have a record of how many days' spotting you had before AF started. Hope that helps! Sorry it puts you back to CD3, but on the other hand, it'll make your follicular phase seem shorter and your luteal phase seem longer!