Hi Katy2,
Sorry to hear that you've had to chase this up a few times, especially with a payroll that size. That's definitely not the kind of extra admin anyone wants each week. I've gone ahead and run a fix (script) over your file on our end, which should sort out those corrupt employee cards and get you back into them properly. Give it a quick check when you can and hopefully it's all behaving itself again.
If it's still playing up or if it pops back again down the track, I totally get that lodging a support case and waiting isn't ideal when you're on a tight payroll schedule. You can jump onto our other support options here to get quicker help in real time.
Regards,
Sai