Yes, we had our confirmations and they checked them.Did you bring the confirmation to show that you have the appointments even though those were booked on the "glitchy" website? I do have the confirmation printed and ready to give biometrics on 21st July. But I checked my IRCC yesterday and it showed another random location of ASC biometrics.
They had our IRCC number on files too, so the appointments that we booked must be real ones.