There is no inconsistency there. You can edit the columns and rows as you wish. This is not a admin configurable option but we can look at adding one.
The reason we ask for urls is because this is a support site. You say something breaks out of your widths well quite simply there can be way more reasons why this happens than the one thing you post here. You meantioned showproduct and uploadproduct. Depending on your site the reason why things break can be different from one site to another so just me looking at source code does nothing.