Off Infected behaviour - intended?

[zico]

Actually I have to admit I've beaten the game by now and moved to Amnesia.
Next time I'll play I'll try the hardest difficulty. However it was very interesting playing this way. Mostly I really had to improvise luring the Infected away or actually encountering and fleeing from them.

Funny thing: If I transfer a Linux Savegame to my Windows installation the Infected guys are broken as well - mostly they will not appear at all.

Speaking of not appearing:
I feel Black Plaque is very empty. Often in the bigger areas (where maps are on the wall) I expected a lot of them patrolling around like the digs in Overture. But I think in the whole game I only encountered 6 or 7 Infected. Is that normal?