Hopefully someone will correct me if I'm wrong on this.
You're mis-remembering a few things and forgetting one extremely important thing.
First, there is no canonical
Sylea-class battleship.
CT's Library data,
S:9, the
Rebellion Sourcebook, all of them agree that it doesn't exist. There was, however, a famous battleship
from Sylea, the
Empire's Banner, on which a bomb-laden courier robot exploded in a terrorist plot which provided the impetus for the Shudusham Accords.
If your memory is anything like mine, it most likely mixed and matched "battleship", "Sylea", and "library data" while also forgetting "Shudusham" and constructed a "memory" concerning a
Sylea-class battleship.
Second, you're forgetting that the Wiki is essentially
GARBAGE and that any entry there must be examined with great care - especially with regards to
who uploaded the information and
where the information allegedly came from.
Any damn fool can upload any damn thing to the Wiki as the page you linked once again proves. Kline decided to insert into canon a battleship he personally designed while also making the absurd claim the Imperium somehow only builds and uses that design in a single backwater subsector in Daibei. (Yeah. Sure. Pull the other one.)
You forgot that the Wiki is garbage last week too when the entry concerning the Battle of Two Suns confused you. After you wrote on April 9th about how a Wiki editor's "fanon" being passed off as canon confused you, the rest of the Wiki "Elves" quickly erased their previous handiwork within 48 hours and rewrote the page to a purely canonical basis.
Winston Smith and the rest of the gang at the Ministry of Truth would be proud at such a rapid use of the memory hole.
Remember, you need to take any of the Wiki's claims with a dTon of salt and remember to especially scrutinize any claimed sources.
For example, Kline notes the
Rebellion Sourcebook as a source in his
Sylea-class Wiki page. However, the only canonical information he actually used from that source was the number of the fleet stationed in Cruxway subsector. The rest of the entry is entirely invented and is hiding behind the rather tiny canonical fig leaf of the fleet's number.