I am sorry to say this, but my research indicates that EJ may have misled you, @athena53.
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Fortunately, you can still take a deduction for your contribution if you live in MO and the EJ plan is a qualified 529 plan. See page 15 of the instructions here:
https://dor.mo.gov/forms/MO-1040 Instructions_2021.pdf
You may be able to roll over your EJ 529 into a MOST 529 plan, but your 2% up front fee may be gone forever. Switching to the MOST 529 plan would save you the 2% fee on future contributions, though.