page glossary unreachable, /glossary redirect?

Hi, we are developing our site and are testing your glossary plugin.

We have a page called “glossary” (permalink …/glossary)
We then installed the plugin and added one glossary item.

Now when we open the /glossary page (no changes where made) we are immediately “redirected” to the new single glossary item… not what we wanted.

We deactived the plugin and now when we access /glossary there is still a redirect to … nothing and we get an error.

In short, after installing the plugin we are unable to reach our own /glossary page.

We deinstalled the plugin, but the problem stayed.

What can we do?

Thank you,
Bob