Rabbit, thanks to you I realize now that the description I have written wasn't clear. For some reason the client wants some information to be stored only on the form entries and not in the table. In other cases I used some workarounds which meant doing things in a more messy way and using some unbound controls (for instance, rather than using a combobox to allow multiple choice, which the client said was inconvenient, I used unbound checkboxes). Anyway, for different reasons, there's some data coming from people who are filling the questionnaire, which should be saved only on their form entry and not in the database table. The problem is apparently, as Seth pointed out, that controls should be bound to allow different input for different entries.
Seth thanks again. I thought it might come to this, but that means I have built the whole thing wrong and should start over, this time splitting the form and table to make it easier to manage (as I have over 100 unbound controls). Still hope to come up wth something better, or have the client change his mind :)