Strange Behaviour of Bevel I hope that someone can help a newb
At my learning project, I got an mirror modifier acive.
Than I added some cubes and played with them.
To learn something about cylinders I added one - yes firsttime shortcut used correctly.
I marked the top verticies and added a bevil modifier via &quot;CRTL + B&quot;
When I try to morph a sphere, the situation in the screenshot appears.
For me it Looks like I got 2 &quot;Centers&quot; or something but I dont know how that can be fixed.
Already tryied to delete the cylinder and add new one, tried to work with additional loop cuts but Nothing helped :-(  


In Edit Mode setup Mirror Modifier in Y and Z.
Add a cylinder on world origin
Scale the cylinder
Add the bevel and try to round up the upper half of the cylinder to
a spherical shape

Then I took the object and moved it to make the screenshot. So bevel was used at starting Point!
This is the result:

The result I would describe as the bevel tries to move each of the vertex and not only the top ones (result of experiment see last rows of that comment) but all the vertex all around the wall of the cylinder. It seems that the Vector of moving is straight to Y axis
I tried that again while only marking the top vertex - doesn't help to get the Right result
26.6.2020
Additional Information as requested
I added an Image of what I want to do.
Take a cylinder, add a bevel at the top, move the bevel straight up to get a sperical top.
This Image was created in a new model but it doesn't work in my target model.
Yes I tried and deactivated the Mirror modifier and the result is the same.
I tried all Ctrl + S  Points for the Cursor but it has not solved my problem
Found solution:
Edit mode: Delete Cylinder
Switch to object mode: Add Cylinder
object mode: Scale Cylinder up
Switch to Edit mode: bevel