Actually, Howard, I think you're referring to the descriptionformat field of the mdl_user_info_field table. I'm referring to the dataformat field of the mdl_user_info_data table.
The image shows 3 records from one of my "other fields." Fieldid 6 is a text field. All three records have the same content, "xyz" (for testing purposes), and yet only one of the records has a dataformat of 1.
The reason this is even coming up is because I'm testing the local_profilecohort and enrol_elediacohortgreeting plugins and the two records with a dataformat of 0 are not being handled as I would expect them to be.
One other thing I'm noticing is that, in the mdl_user_info_data table, all records for fieldid=6 up to id=11619 have a dataformat value of 1 and all records after that gave a dataformat value of 0. Unfortunately, I don't know what happened at that point to change the dataformat value.