Ladder allows to climb both directions at the same time

## Testmerges
#9254: 'disables cade anchoring on the almayer, alternative to #9144' by psyendrocronologicalwarfare at commit 6f2fddd0df
#9405: '[EVENT] Pathogen Confluence' by realforest2001 at commit 1839861754
#9582: 'Wey-Yu Intranet Version 1.3.8' by realforest2001 at commit 7b2dfbcafc
#9590: 'Multi Z Almayer [MDB IGNORE]' by spartanbobby at commit 3f6ed293c8
#9427: 'external authentication system' by hry-gh at commit 37fd6ff572
#9717: 'pred gauntlet fix and cleanup' by Detective-Google at commit d3706c914e

## Round ID
28362

## Description of the bug
You Can climb two or more ladders at the same time in different directions

## What's the difference with what should have happened?
only one ladder is climbable

## How do we reproduce this bug?
1) Stand on the middle deck, service one
2) Climb up on one ladder and down on another ladder
3) WEEEE!!!

## Attached logs
```
You start climbing up the ladder.2
Tess Conway climbs up the ladder.2
You climb up the ladder.2
You start climbing down the ladder.
Tess Conway climbs down the ladder.
You climb down the ladder.
You start climbing up the ladder.
You start climbing down the ladder.
Tess Conway climbs up the ladder.
You climb up the ladder.
You climb down the ladder.
```

## Additional details
- Author: BlackSwanny
- Admin: KiVts
- Note: None