I'm sure you've probably answered these questions elsewhere, but humor me
. Do you have a chart to look at (i.e.: have you been tracking your basal body temperatures)? The reason I ask is, your period can only be "due" if you are actually ovulating. Lemme 'splain (although it might all be stuff you already know)...
I have somewhat irregular periods. Usually they are 28-32 days long, but I have had a few that were closer to 40 days long. Since I've been tracking my BBT, though, I can tell you that in my case, what varies is the period of time leading up to ovulation (Follicular Phase or FP) and not so much the period of time between when I ovulate and when my period arrives (Luteal Phase or LP). This is true for a lot of women because the corpus luteum (what is left of the follicle after it releases the egg and what secretes progesterone) only lasts up to about a max of 16 days if you are not pregnant (according to TCOYF). Once the corpus luteum stops functioning, the progesterone level drops, and AF begins. In my case, my LP is almost always 12 days-- if you want, you can take a look at my chart (by clicking the chart icon in my signature) and scroll through and see what it looks like for there to be varying FP lengths. In the cycle starting 7/23/07, which I named "The Neverending Cycle," I didn't O until CD28-- so to answer your question, yes, you can ovulate as late (or later!) than CD30.
So, what I'm wondering here, is are you tracking your BBT (OPKs or the CBEFM are okay, but they can only tell you that you are likely to ovulate, the rise in body temperature confirms that you in fact have)? Because you may be having very long FPs, but if you're ovulating (even though it's taking longer) you might be having regular LPs-- but you think your period is "late" because you actually ovulated a little or a lot later than you think you did.
If you are tracking your BBT and it appears that you are ovulating at your normal time and are actually having unusually long LPs (like 19+ days) and you're not pregnant, then I'm not sure what to tell you-- a google search didn't pull up much helpful information, maybe someone here has experience with it.
The third option is that you're not ovulating-- hopefully, this is not the case. You said you had six months of 32 day cycles and are now on your second long cycle? If that's right, then I kind of have two lines of thought-- one, it's normal to have occasional wonky cycles, wait until your next cycle and see if your body gets back on track. Or two, it might not hurt to make an appointment with an OB to discuss your long cycles and concerns.
If you have a chart you don't mind me looking at, if you post (or PM me) a link, I'll take a look and see what my thoughts are based on looking at that if you'd like.