@laxsun thank you.One year is counted from medical pass date that can be seen in the MyCIC Page.
If you have not sent PCC of your mom, I suggest you to send it so that her application may have chance of being looked upon.
I got my mother's gcms notes. It provides the validity of the medicals but its less than 1 year from the date passed on My CIC. Not sure which one is the correct date.
Also, you suggest I get the PCC up front before they request it? Have people done that?