You probably have the answers thanks to Mr. Smith's postings already, but justincase:
* 92e Ligne:
- two battalions had been detached to a forward post in early June from Graz.
- MacD picked up these two battalions when he left Graz on/about 9 June and attached them to Lamarque (brigade unknown); the other two remained behind in Graz with Broussier.
- these two battalions remained with Lamarque till 10 July and fought under Lamarque at Wagram.
* 18e Léger: when the light regiments were disestablished after N's day, line regiments took up the "traditions" in sequence starting with 76th Ligne (1st Léger), so 93rd Ligne become the tradition-bearer for the old 18th Léger. Sadly, this perpetuation of regt'l traditions/histories did not go beyond the 100th Ligne/25th Léger.
And: great story about the attempt to purloin the regt'l standard!