Duplicating tables with different filters

I’m having a hard time. When I duplicate a table and put a specific filter like “where - your class - is - 1”, it was suppose to appear only the records where the fiel “class is 1” appear.

However, when I fill out the form created to feed this database, and put it in the field “class 1”, it just goes to the original database, and it doesn’t go to the other duplicate base but with the filter.

I remember this working normally when I had a PRO plan, and now I have a free plan and it is no longer working.

Does this problem have to do with the plan?