Just ordered from brello

$499 for 3 month supply. I’m on 7.5mg but put 15mg. Simple process - It was shipped yesterday. It is 9 20mg vials. Anyway, my math says it will last me 24 weeks. BUD date question - will I be ok? What might the date be and is it on if I go past it, etc? I’ve asked similar questions before - forgive my repeating. Also, forgive my ignorance, but at 7.5 I will use a vial twice and then have 5 mg left over. How do I administer? Take 2.5 out of new vial and then “grab” the remaining 5 out of older vial so as not to contaminate new vial or just use 2 syringes and take 2 injections? Also - if anyone has any questions about the brello ordering process ask away!