First one has to find out how this formation did look like.
Apparently there are two (or more) conflicting descritions
One the report of Broussier who gives
8 bataillons déployés des divisions Lamarque et Broussier forment la tête - les 13 bataillons restants sont formes ployés en colonnes serré sur les deux ailes
(Pelet, volume 4 page 222)
In case the battalions are deployed - means for me - that they are in one line 3 deep (I cannot see a double line)
celui de général Lamarque dit que l'empereur avant ordonné de former les divisions en colonne (formation indiquée dans les instructions générale), Lamarque rangeas ses troupes en colonne de bataillons déployés l'un derrière l'autre à une très petite distance.
(footnote to Pelet volume 4, page 222)
in my view one could make an interpretation that
the first line was a line of 8 battalions deployed - and that the rest - 13 battalions are formed on each flank as follow up and to cover that line.
Lamarque forms 8 battalions in one huge column - each battalion in line but this time one behind each other - that would give a column of 24 ranks deep - deeper like a phalanx.
Also I have difficulties to understand what Napoleon did mean when he ordered to form the divisions in columns - like each battalion in column - or one division forming a colonne de battailons déployés - as indicated by Lamarque.
I find it difficult to undertand why such a column would have to be supported on each flank by furhter battalion columns.
Also one has to comprehend why MacDonald used that formation.
as indicated he was under a possible threat of cavalry at this flanks.