I think this is a bug but I wanted to mention it here in case there's already a bug entry for it.
1. In confluence, create a table with more than one row
2. Place cursor in a row and put a JIRA filter entry in it.
3. Place cursor in the row below that, and put another JIRA filter entry in it.
What I'm seeing is that the resulting filter gets put in the row above the one that I selected, replacing the filter in that cell. This only seems to happen when using the "Table" display option rather than the result count.
I'm also seeing it occasionally place the filter in the column to the left of the one that I had selected.