Very confused on second battle of the game (Dorter)

Hi, im quite confused on this game as a whole, I tried doing this batle while I was lv4/5 and the enemies destroyed me, so I went into farming, I did some "Focus" Job lv up to have everything unlocked in Squire/Knight for some of my characters

But the level of the enemies keeps going up? Im level 20 with Ramza and the knight actually 2shots everyone in the main party (Delita is lv4 which vs them is a one shot)

Am i making a mistake here? Do I have to try again with some new strategy? (I'm running 1 archer 2 knigts 1 chemist full master job.

Edit: seems i downloaded a "hard mod" which matches the level of your party, thanks everybody :P https://imgur.com/a/HU96cnZ