Themes Sequence Changing?

we just release new item, but item position sequence is changing. now my item is position lower than themes that release before me.

what is happening?

this is screenshot where is should be located :
but now its become like this :

i know its nothing to envato, but its important for us because we get less exposure than how it should be.
can anyone explain what happen with this item sequence?

any envato staff can help me with this issues?