Alcazar Plus Upper Rooms Admission Question

I thought I read somewhere that the upper rooms ticket includes access to the rest of the palace without limitation. But I can’t find that info now. However ChatGPT says “ A ticket to the Royal Upper Rooms (Cuarto Real Alto) includes general admission to the entire complex. Once inside, there is no time limit, and you are free to explore the main palaces and gardens at your own pace until closing time.” I wouldn’t rely on this as gospel but maybe it will give you info to start with in seeking your answer.

Arriving up to 60 minutes early allows you more time for the site. You can stay as long as you like after the Upper Rooms visit.

This is exactly what is says:
The selected time will be the access time to the Upper Royal Chamber.
As it is necessary to go through security checks, entry to the monument will be 60 minutes earlier, through the Lion Gate.

It is ESSENTIAL to be at the door of the Upper Royal Hall (Second Floor) 15 minutes before the scheduled time for your entry.

Otherwise, you will NOT be able to visit these rooms and will have to purchase new tickets for the next available session.

Visit to the palaces and gardens of the Royal Alcázar of Seville
* Visit to the Royal Upper Chamber.

But as Chani said, you can stay after, no problem. Tix are checked at the Port de Leon gate and at the Upper Room security, buty nothing after.

Do NOT be late to the upper rooms. You have to put everything, incl Cell phones, into a little locker and go through a 2nd security check. Totally worth it, it's amazing.
I was just there in April and stayed a good 2+ hrs after the tour was done.

The RS Guidebook is not to hand so I can't evaluate the summary provided by the OP. Perhaps it is a misinterpretation of RS's meaning? Certainly, if the OP's interpretation is accurate, it is not my experience or that of the other posters.

The "Upper Room" ticket gives an entry time, no entry prior to this time, do immediately check for the entrance to the "Upper Room" area to ensure you will be there 15 minutes in advance. (The entrance is marked on the RS Guide maps - or if not there now, it was marked in previous editions). There were folks at my timeframe who were too late to join the tour. Afterwards, stay as long as desired. This is exactly what others have described above.

I was curious so I AI'd the statments/question asking for an evaluation. Disclosing source of following!!! This is Google AI as it says, mistakes can happen, but the answer makes sense to me based on recent experience and the answers provided by others above explaining their experiences:

The "VIP Status" / "Arrival as Early as Possible" Claim
The Reality: Rick Steves is referring to the fact that holding a ticket with the Upper Rooms upgrade grants you a privileged entry condition. You get to bypass the regular, often hours-long walk-up line and head straight to the Puerta del León.
The Catch: You cannot simply arrive as early as you want—you must abide by the 60-minute early arrival window. You will not be allowed to enter the Puerta del León before that window opens for your specific time slot.

Enjoy - I especially liked the "Upper Rooms" and gardens.

We were just there. It allows you to enter the venue (lower area) 60 min ahead of the scheduled time to the upper rooms listed on your ticket but once you are in , you can stay as long as you want. (In our case our upper room visit was less than an hour after opening so we went at open)
The upper rooms visit however is a guided tour which lasts slightly under 60 min and they are ushering you from room to room .

Thanks everyone for the clarification. It is very helpful.

Ted