Victor should get the command of a corps - to please Lannes, so that was a good opportunity. The relationship Bernadotte - Napoléon was a bit stained after the unfair accusations of Napoléon - in 1806 - Jena and Barby - and indeed stayed so for a life time - despite the impeccable serving of Bernadotte.
For more - read one of the volumes of Titeux - about Dupont - links provided thanks to Steve Smith - where Titeux discusses this topic quite well.
The man who would have deserved 1er corps - was Dupont, who was already another victim of close ups of Napoleons mistakes (in 1805)