Help to reliable image prompt

Hi everyone!
I’m trying to create a prompt for generate a png image with 2 tables for scheduling the homework for my kids, but every it’s very unreliable.
Every time Copilot or ChatGPT create the image they missing some instructions or something.

Specially with the table are the problems, adding o missing some row or columns.

I also tried to make a blanks table (without text) but the same problems happens.

Could you tell me what it’s wrong?

The prompt it’s this one:

Create a DIN A4 horizontal (landscape) high-resolution document.
The layout must include two tables, perfectly aligned vertically, separated by exactly 5 mm.
Any illustrations or decorative elements must NEVER invade the space reserved for the tables.

⸻

1) UPPER TABLE — 8 COLUMNS, 6 ROWS

Required structure:
• 8 total columns:
• 1 left column for the “Agenda” items
• 7 columns labeled “Text1” through “Text7”
• 6 total rows:
• Row 1: Header row (the top-left cell —row 1, column 1— must be empty)
• Rows 2–6: Agenda items (Agenda1 to Agenda5). All remaining cells should be empty.

Header row (Row 1):

| (empty) | Text1 | Text2 | Text3 | Text4 | Text5 | Text6 | Text7 |

Left column items (Rows 2–6):
• Row 2: Agenda1
• Row 3: Agenda2
• Row 4: Agenda3
• Row 5: Agenda4
• Row 6: Agenda5

All other cells must remain blank.

Visual style of this table:
Clean, minimalistic layout with thin lines and soft colors.
Rectangular format, horizontal orientation.
No thick borders or decorative elements.

⸻

2) LOWER TABLE — 4 COLUMNS, 5 ROWS

Required structure:
• 4 total columns:
1. Item (Group 1)
2. XP (Group 1)
3. Item (Group 2)
4. XP (Group 2)
• 5 total rows, containing the following data:

Group 1 (Columns 1–2):

Item
XP
Agenda1
5 XP
Agenda2
5 XP
Agenda3
7 XP
Agenda4
7 XP
Agenda5
7 XP

Group 2 (Columns 3–4):

Item
XP
Agenda6
10 XP
Agenda7
25 XP
Agenda8
-15 XP
Agenda9
25 XP
(empty)
(empty)

GENERAL VISUAL RULES
• Both tables must be aligned vertically.
• There must be exactly 5 mm of space between the upper and lower tables.
• Do not add extra empty rows.
• Do not add unnecessary borders.
• The tables must be clean, readable, and minimalist.
• Illustrations in the document must never overlap, touch, or visually interfere with the table areas.