Form won't allow multiple choices in payment section

Our form https://www.jotform.com/build/72186221751150 is intended for people to pick one session or multiple.  We used this last year, and updated the dates for the new school year.

For some reason it is not allowing the viewer to select multiple sessions.  I cannot find why this is happening.  This was not an issue on last year's form.

Please advise.

To allow this, simply edit your form on the builder, search and select the payment field, then click on the wand icon and turn on the option to allow multiple products selection:

Found it! THANK YOU!