The only Open Pool Practice for Kayak shown on the Mehlville website is on Wednesdays, 7:30-9pm, and the dates shown are 4/1/2020 – 5/6/2020. Mark mentioned that “everything is pushed back a week”, so maybe your 3/25 start is now 4/1?
But, yes, these Sat-Sunday sessions are different from (and in addition to) that Open Pool Practice on Wednesdays.