Fertility monitor vs test sticks

I’ve been using the clear blue fertility monitor this month. Currently on cycle day 20 with no highs or peaks so far. Alongside I’ve been using ovulation test sticks. The sticks have had faint lines for a couple of days, and today what seems to be a positive. Not sure how this can be given the low on the monitor? Any suggestions? ive had fertile mucus for around three days too!

Thanks !