I am trying to update this:
| 1 | 2 | | |
| 3 | 4 | | |
| 5 | 6 | | |
#+TBLFM: @1$3..@3$4=$-2

to this:
| 1 | 2 | 1 | 2 |
| 3 | 4 | 3 | 4 |
| 5 | 6 | 5 | 6 |
#+TBLFM: @1$3..@3$4=$-2

doing C-c C-c on the TBLFM line.

All I get is this:
| 1 | 2 |   |   |
| 3 | 4 | 3 | 4 |
| 5 | 6 | 5 | 6 |
#+TBLFM: @1$3..@3$4=$-2

The first row results are ignored.

Here are the conditions in which I tried:
- Emacs: 26.1
Config: Spacemacs
Org mode: 9.1.13
- Emacs: 26.1
Config: No config
Org mode: 9.1.9

In both case, it gives the same results. Is that a normal behavior?

Regards.