Forms issues

I have 2 forms issues I need help with -

1) I sent out a QR code for schools to use.  I had some school ask for a smaller code and I created a new one and asked schools to use it.  One school did not change and now the info is going to a form I don't have access to anymore.  Where can I find info.

2) I have shared forms to collaborate with specific people in my org, but some of them are unable to access the forms.  Why won't it let them access the info? I have double checked that they are specified.