What???
- 2-Step foundations have no issues at all with cats or sims. The issue they have is with Large Dogs only. And if you use Simler90's Stair Mods, the issue is fixed.
- There is also no issue with finding the front door, because of a 2-Step Foundation. (No more so than the regular TS2 issues with finding the front door!)
- The 2-Step Foundation also does not cause basement wall issues. ANY "dug" basement will have that steep ground-slope. (That's why Moo made the Grid-Adjuster able to make No-Slope Basements - they don't have that slope.)

Unless... you made the 2-Step Foundation incorrectly?

Incorrectly? Maybe. That was my first time.

I had no mods in game. Believe me, I cleaned up the downloads folder for the contest. I have just two sets TS4 Basement Treasures and Industrial Loft. Pretty much far from affecting the stairs, right? And I had no issues in those paticular house with large dogs, just with cats. And that was like they had a chance of using their way around which I built there but they were not use it autonomously. Two step stairs were attempted, but their action skips every time. Cats came to it and then didn't use it.

I think Sims 2 came up very buggy which means every state is unique. So thank you very much for testing every house before sharing. Your houses are looking trustworthy. I have few of them. Without 2-step foundation but with no-slope basement.

You should try one of my CC-Free 2-Step Foundation houses and see if you still have problems with it.

Okay thank you.

wow, downloaded in a heartbeat I want to tour it 'in real life', haha

Don't look at the basement ceilings. These are not that good