Non Savvy Traveler,
It's recommended that you start your own post, however, I will answer your question as it may benefit the OP as well.
I went to the site to buy tickets. I selected the 'Alhambra General' option. It is asking me to select a time and it is every hour yet there are only two tours to the Alhambra - one in the morning and one in the afternoon. So I am a little confused regarding what time to select. I selected, 8:30-9:30 option and it gave me only Nasrid Palace Also, it is giving two choices to pick up the tickets. Which is a better choice? We are staying at the Alhambra Hotel.
Basically, you need to choose when you want to visit the Alhambra complex which is very large. You can choose morning ( 8:30 am-2 pm) or afternoon ( 2 pm- 6 or 8 pm), then you will choose a time to visit the Nasrid Palace.
You will have to enter the Nasrid Palace, at the time stamped on your ticket, or within 30 minutes after such time.
If you arrive 30 minutes after the time stamped on your ticket, you will not be allowed to enter the Nasrid Palace.
You will also need to get to the Generalife palace before your time period expires; 2pm if you've chosen a morning ticket, or 6-8pm, if you've chosen an afternoon ticket. Once you enter the ticket area, you can linger as long as you wish.
Keep in mind the you can visit the Carlos V Palace at any time, as it's free. We visited it on a different day.
My mom & I were in Granada in October (2015), & we chose an afternoon time for our visit to the Alhambra, because I'd read that the mornings are more crowded due to all the tour groups.
Having said this, I believe the Alhambra is always crowded, since it's the highlight of Granada!
Regarding picking up your Alhambra tickets, you'll find your answer
on this recent post.
Make sure you bring the same credit card used when you booked your
tickets as you will need it to retrieve/print your tickets.
You may read about touring the Alhambra here.
I am over 65 and but it appears that you have to be from EU to avail the discount. Am I right?
Yes, you're right. You have to be a citizen of the European Union in order to receive a discount to the Alhambra.
Have an amazing trip!