Yea, with all the pills I've taken, if you miss 2 days, on the 3rd, you're to take 2 (the two days you missed) and on the 4th take 2 (from the 3rd and the current).
I take mine at night (I work nights and it's always been easier for me to remember, plus I'm awake at 9pm way more than 7-9AM), so I've missed two, but I remember like 10hrs after forgetting the 2nd, so I take 2 then, and then one, 14hrs later, my normal time. Or sometimes, if I miss 1 at 9pm and don't remember until 24 hrs later, I take 1, take another 12 hours later, and take the next, on time, 12 hrs later. Make since? It seems to have worked for me. No babies, yet! Haha.
ALSO: If you ever, EVER, miss 2 pills, in a row, you are to use a back up protection (condoms, etc.) for a full week!
And yes, if you miss 3, throw away the pack and start a new. (Not sure if his holds true for Seasonale-type pills, such as I'm on, but thank god I haven't missed 3!)