[Elecraft] question re K3's KAT3 ATU

[Kate Hutton]

I am often on the same frequency daily - 3.575 MHz, but the ATU does not
give me exactly the same answer every night.  On my wire antenna it always
starts at 5.8:1 to 6.1:1 and ends up at 1.8:1 or 1.7:1.  But sometimes, it
gives me 1.0:1.  The power shown on the display when transmitting always
seems to be more or less what I set it for.  What is causing this
inconsistency & is it a problem?

Thanks,
73 Kate K6HTN