Not FMU then Peak

Hi!

I’ve been using Advanced CPK with first morning urine every second day this cycle (starting around 10dpo) with blank circle as a result. The day my temp shot up I tested at night (not fmu) resulting in blank circle - this is the only time I tested at night. The LH line was barely visible so my urine may have been a little diluted. The next morning I tested and got Peak/solid circle. It seems like my temps confirmed this as ovulation day. However, all of my cheapie OPKs are clearly negative.

Did I do something wrong (not using fmu)?

Thank you