Splitting a wall, why can't it be connected?

[LeeJaeYoung]

After Spit

Why did this happen?

I don't understand if I need to do more to Ctrl+T Floor ... None for this simple task.

And as I will summarize and ask, if only 3 or more walls are gathered at one point, Archicad has a lot of problems with the connection between the walls.
What word should I search for to solve these problems?

Could it be that the coordinates of the wall are like this?

 

I use translate google

[SenecaDesignLLC]

There must be something else there. I have no issues connecting walls that are all perpendicular, angles are sometimes trouble some.

Not even sure how you generated those warnings with walls. 

Are you using composite walls or?

What version of AC are you using?

[LeeJaeYoung]

Thank you for your interest.

A day has passed and now it is connected even if I change it again ^^