Unable to book driving test - keep getting kicked out of the queue!!

I've looked at several threads on this sub but they don't exactly capture what I am experiencing.

Logged in at 5:30 monday on DVSA, it said not available. I waited. Refreshed at about 5:38 and then put me in a queue with only 200 people ahead. This seemed great.

Then comes 5:45 where it forces me out saying I can only be in a queue for 10 minutes or so and that I've lost my queue place. But the screen also says:

"If you see a screen that says "Oops, you went away and came back again", you can continue.

You will not have lost your place in the queue."

I press continue as the screen instructs and now I am behind by about 7000 people.

How on earth am I meant to do this early enough? So many subs say to log in at 5:30 and then refresh at 6 and they get to book very quickly. Some say 5:45. Either way feel like I keep getting screwed, as if either strategy I do I end up being kicked out and put at the back of the queue.