[HELP] How to have a repeating task that begins at 06:50 and ++1h until 20:50, and then when DONE the last repeater for that day, it would ++1d at 06:50?

[Starlit Sky <starlitsky@gmx.ca>]

EXPECTED BEHAVIOR

I want to have a repeating task that begins at 06:50 and ++1h until
20:50, and then when DONE the last repeater for that day (20:50), it would ++1d at 06:50 and ++1h until 20:50, and so on. I've tried many things, but nothing seems to work.


REPRODUCE OBSERVED BEHAVIOR

1.
```org
* TODO a repeating task
SCHEDULED: <2024-09-29 Sun 06:50 ++1h>--<2024-09-29 Sun 20:50 ++1d>
```

which results in
```org
* TODO a repeating task
SCHEDULED: <2024-09-29 Sun 07:50 ++1h>--<2024-09-30 Mon 20:50 ++1d>
```

2.
```org
* TODO a repeating task
SCHEDULED: <2024-09-29 Sun 06:50 ++1h ++1d>--<2024-09-29 Sun 20:50 ++1d>
```

which results in

```org
* TODO a repeating task
SCHEDULED: <2024-09-29 Sun 07:50 ++1h ++1d>--<2024-09-30 Mon 20:50 ++1d>
```


QUESTION

Is there something I'm doing wrong with timing syntax, or do I really need to do the following instead?

> An alternative to using a repeater is to create a number of copies of a task subtree, with dates shifted in each copy.  The command ‘C-c C-x c’ was created for this purpose; it is described in *note Structure Editing.
> 
> ---File: org.info,  Node: Repeated tasks,  Prev: Inserting deadline/schedule,  Up: Deadlines and Scheduling


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--
Starlit Sky