Was more than one carrier missing?
The conference room wall on the D also had the others, but not that one.
Which (that were in a previously established group)?
DULMUR: Be specific, Captain. Which Enterprise? There've been five.
LUCSLY: Six.
SISKO: This was the first Enterprise. Constitution class.
The dedication plaques also start counting with the 1701 as the first to bear the name.
Do you think pointing out mistakes, things that don't fit, finding contradictions and discussing them is whiny and disdainful? For me it's part of the fun of being a fan and seemingly knowing more than the production team, or having a deeper understanding of the material (it just feels that way when they deliberately choose to ignore established things cause they don't care). I still would've preferred to see the adventures of the XCV-330 instead of the NX-01