What level of finds have you set it to (the slide bar goes from 0 upwards) it defaults to a certain number depending on how many 'grids' you have completed - for you I guess it is 1
However if it is set higher - when you turn a segment blue it shows finds as well as caches that are not found - it is possible that you have it set on a higher number of finds, for example 6 - you may have found 3 in that red segment but it is red because you have not reached '6'
If you lower the scale to 3 then you will find that segment will change to green
I will change this to a comment if I have got the wrong end of the stick ;-)