Reply to logic question

When i make the siren type sound in logic (afrojack esq) with two keys at the same time, normally if you click the lower key first then it goes towards the lower key or if you click the higher key first the sound goes towards the higher key when playing..but once i save the file and re-open it it forgets if the tone goes towards the higher or lower key and always goes to the higher...how can I make it so it saves the sound it was supposed to make initially

hope this made sense

thanks for any help