just go to the bottom of the DB and check any new items u have made that the index number on the left are in order and that they dont use a normal item name. if u dont do your self now u will never learn.....
I take it you used the negative count, rather than positive. Though you can change the database table to show it above 255 without using the negative count.I have craftily got past the lvl 255 ^^
Nice guess but nope, I included another attribute into the requirement for items past 255