@Lilice I also ordered some at home kits when my glucose was high at 16w MW appointment. The at home test strips, I made sure to do with first morning urine and it always came clear, no glucose. Went to 24w MW appointment and again had glucose in urine for second time! But that wasn't first morning urine, it was after breakfast, so I think that's where mine was high on both occasions, because it was urine after eating breakfast. I had the tolerance blood tests done after the two positive glucose ones at midwife, and all came back fine think that was at 26weeks I had that.
You can have plus 1, plus 2 etc on the glucose tests with MW, and I think that's according to which one you were on in relation to the colours on the test strip so that might be what she meant by "low". x