Category List problem on quote creation

While trying to create a quote by authorized author, the category select box just shows the last one and it ID on 2 lines as list.

I mean : I have 4 categories, all of them giving the same rights to a group
1 member of the authorized group tries to create a quote and th list just shows 1 category instead of of list where they should be 4 displayed (see screen shot attached of the categories select box : list displyed is the 4th of all and its ID is the one displayed, it's not another category)

Edited : 1 more thing ! Then the category for which the quote is saved is a wrong one (so only 1 appears in the list and it's saved to another one (proof that it exists at less)