If I create a matrix field with 5 columns, I am fine. However, if I create one with 6 or more, I am locked out of editing custom field types. I don't see any errors. No CP errors are triggered and the data remains in the db. I cannot, however, go edit the field type to modify or remove the extra field in the matrix. I have to edit the db table and forcefully remove it from the table. After doing this, I can once again edit the fieldtype and rebuild it without the last addition. I have run into this a few times on older sites. I haven't had the need for that many matrix columns on anything in EE2 yet so I don't know if this extended to that or not. Has anyone else run into this before?
I am running EE 1.6.8 on the sites this has happened on.