Items disappearing when log off

[Manuel puente]

hello, i added a lot of sprites to client 10.37, and then i added them to OTB... and i can make the new items, but some of them disappear when a player logs off, example, 8 of that items, which id's are 22703 to 22713 they dont disappear but then after the 22713 it jumped to id 45329 and beyond... the items past id 45329 are disappearing when a player logs off, what could it be?

i guess is some compiling server business right? or what is it?
thanks

sorry for my bad english