Question: Execution of code in Tables

I am trying to use Tables to better organize the layout of my Document mode worksheets. I have noticed two problems thus far.1) When I use the triple exclamation point icon to execute the worksheet, sometimes the code in the Table is skipped. and 2) I put a simple plot command in one cell. The plot showed up in the cell, but the grapgh also showed up twice below the Table. If I only execute the code in the cell, this does not happen. There is no hidden code. If I comment out the plot command in the cell, the plot disappears from the cell and also after the Table.  I should point out that in the same worksheet I have a similar sort of Table (except it is 1x2 instead of 2x2) with a plot and it behaves as one would expect.  "Tables" seem to be a nice feature, but I need help in avoiding this erratic behavior.