Weather not matching sim in PMDG 737 EFB

Hello so I'm not sure if I'm doing something wrong but in the EFB for the 737 I have the weather source set to the SIM in the settings, so that even if I set custom weather I can easily import the weather data into the EFB. However whenever I click the button to import the weather the numbers don't match what it have set in the weather menu. I would have to check if it's still importing the live weather or not as I thought if you had the source set to sim it would import the numbers you have set in the weather menu.

So is there something I'm doing wrong or is this a bug?

Thanks