You said "last night" and then "this morning" -- so I assumed there was NOT a day in between. Did I read that wrong? It's basically anything within a 24 hour period ... so your first deposit "last night" started the 24 hour period ... which means if you then made another deposit "this morning," that would still be within the same/initial 24 hour period. I only know this because back when I used to buy bitcoins that way, I had that problem a few times. Annoying as shit because it happened even when I used a different bitcoin address and different amount. Still, keep bothering bitinstant support until they push your transaction. This is an issue on their end and they claim that they will refund you their "fee" if the mistake is on their part (and it is). However, they won't refund the fee unless you specifically ask --- seems they like to get away with what they can sometimes.