Another AC question...I believe that I have read that you sometimes have to ask for an AC, it may not be offered up front. So does that mean I should call and talk to somebody when depositing my week, instead of depositing on the website?
Often, yes.
Sometimes, you'll see a note in your II account stating that if you deposit your week by a certain date, you'll get an AC. You can rely on that (but print and retain the wording!) to make an online deposit.
Sometimes, you'll get an AC after depositing without asking for one, as I did on my two most recent deposits.
However, there have been reports here of people depositing identical weeks with (A) those who ask for an AC, receiving an AC, and (B) those who don't ask, not receiving an AC.
Thus, if there is uncertainty, it's a good idea to call and ask. In some cases, where II hasn't yet decided whether to give an AC for a particular deposit, it might be worth delaying your deposit until a decision is reached, taking the risk that your week might have lower trading power due to the lateness of your eventual deposit.