Successfully enrolled in membership then told failed but seems to be enrolled?

We have a free site where participants in a face to face course are manually enrolled by me – the course owner to access additional support materials.

This has worked and been tested before, however things went weird today.

The process we follow is:
1) set up a user, then
2) we enroll user in a membership, which automatically enrols them in 2 ‘courses’. This triggers an automatic welcome email which allows them to set (reset) their password.

Today when adding people, I was told they were successfully enrolled. When the page refreshed, I was told the last person had ‘failed to enroll’, but this doesn’t look to be true.

In testing with two users, they received the welcome email and could login – and I could see their names in the membership and courses user log and could also see their login date and time.

Is this a ‘fail’ message that is coming in error?

It has made me nervous as I can’t test whether the welcome emails have arrived for all my users. All I can do is wait for them to access the welcome email and set their password.

Would someone mind getting back to me ASAP on this as we started a new program today and don’t want to embarrass ourselves with people losing faith in the LMS.

thank you