Wrong border style when inserting/copying cells

[Michael_K]

I get a wrong border style when insert cells (insert row) and sometimes when I cut and paste cells. Here I cut these cells:

and when I insert them the borders are formatted differently:

Her I just insert a row and get the same border style, although the option "same format like cell above" is selected:

When I choose "same format like cell below" I get the correct style. This, however, is not always an option, because I often have to insert rows above rows with a different style. 

Is there a solution to this problem?

Thanks!

[#2]

The problem seems to occur within a table. When I cut out a cell and paste it somewhere else, the cell that is now empty gets a border. It's strange.

[#3]

Does anyone have an idea why this happens?