Hi guys, can someone help me?

I’m on my 2nd cycle with the CBFM. I’ve been testing wondfo strips alongside it. Last month they were totally in sync:

High days CD 8-10. Peak days CD 11 &12

This cycle:

CBFM has been high from CD6-CD10

But wondfo looks peak today CD10

Plus I added CB advanced opks because DH going away today and Peak was close.

I tested all 3 this morning in the same FMU: wondfo is peak or very close.

CB stick is solid smiley.

But the monitor still only says high 😟

I thought the CBFM & advanced sticks had the same sensitivity?

Why would the monitor be different. does it need a higher LH level? Perhaps to better pinpoint the full surge?

I’m confused & disheartened that maybe this was a false or lesser peak today. I don’t want false hope since DH away now so no other opportunities this cycle.

Any ideas? TIA