Hi,
I was wondering whether your basal rates are correct for later in the afternoon? I know you said you thought they were ok between 8am and 3pm, but maybe from 3pm you need substantially less? My lowest rates are from 3pm- 5pm. I suggest doing a fasting test to see if this is the case. If so, lower some time blocks to account for this and then put your lunchtime ratio up to counteract the post-lunch highs. Does that make sense? I'm not sure of the action of your insulin (I'm on Novorapid) but I adjust a time block 2 hours ahead of when I need to see an effect (ie if I go low at 4pm, I lower the 2pm-3pm time block). Hope you can sort it and feel better!