[BEE] table model incorrectly assigns row and column headers

### Bug

https://ibm.box.com/s/qkgxlyzozev7htimbvst1sehfusacsd3

This is the output in html format from running the document below. Right now, the 2 leftmost cells in the top row aren't assigned column header status and the every cell in the first two columns from the left (except those in the first row) have been assigned row header status. There should be no row header cells present and the entire top row of the table should be made of column header cells.

### Steps to reproduce

Run the following file through the Docling CLI:

https://ibm.box.com/s/aqqedyx92g3723yqfe5atuxndgdfz4c2

### Docling version

2.70.0

### Python version

3.11.9