Hi! I'll see if I can answer your questions.
It is next to impossible to get one reward, let alone have enough time to get two.
You will need to log in a few minutes before 4:30EST. Go to the rewards page and keep refreashing until the rewards come up. (I've had them come up at 4:28 [my time] and as late ats 4:34. Just keep refreashing.
Once the rewards come up, click on the one you want. You will have to go through many screens before you get the reward. This will be time consuming your first time. After that, it'll be there.
I don't worry about using rewardtv to get rewards for our trips. I just choose one that I will use. My personal opinion, is that you go for the more point one that has the most gift cards. As for Thursday, that is the ToysRUs.
When you do finally get a reward, and say it's not something you would use for your trip, when you use the card, put the $5 or $10 in you savings for your trip.
You won't always get a reward, but rewardtv has been very good to me. Just got two $10 cards in the mail this week.
I hope I've answered your questions and good luck!
Lori