Might I also suggest that taking 40units in one go might be causing you some issues as well. I was on a similar dose pre pump, and kept having to up it and up it as it appeared it just wasn't working. when i changed consultants to go on the pump she suggested that I split my already split dose into 2 lots of 20 at the same time but it just reduced the pooling effect and helped to stabilise the highs. Also I would be inclined to suggest oher sites as well. Try different length needles for different areas of your body, to see if that helps as well as carefully examining before you inject. I know from experience it's so easy and your arms and hands go to similar type places that they are used to. Your basal does seem to high in comparison to your bolus at first glance so I'm wondering if because of the PCOS some metformin might also help? I would eat a similar sort of diet to you have a similar BMI and would take 22units basal and up to 15-20 units bolus a day (albeit on a pump) I also have PCOS and 4 ovaries, so know what a pain in the bum hormones are! I would try and improve your sites and see if that makes a difference, if it doesn't I'm always inclined with ladies to think hormones either through stress or just being a lady.
As for losing the extra bit of weight (I'm also on a bit of a mission myself after 6 months in front of a computer and going to class/ stress munching). Whenever I hit a bit of a plateau I find it helps me anyways, to change excercise, so that you are excercising different muscle groups etc, and also to step it up another gear just to shift that last little bit you want rid of. I've always had to do it, For example I've easily lost 3.5kg in a couple of weeks but fo the past 3-4 weeks I've just stayed the same. Time for me to switch from cycling to swimming then maybe running, every time when I hit a flat increasing the intensity.
Just a few suggestions don't know if it helps,
Laura