Sorting in ELM motif drop-down list is not case-independent

In all drop-down lists of ELM motif (such as the one below in the Classified page), the class LIG_eIF4E_1 and _2 are at the bottom of the list. They are the only ones with a lower case letter after the first underscore, so I guess the sorting of motifs is taking into consideration the case. It should not.