Hi,

Is this normal for the 3rd devices always running in such low accepted?

refer to the link below,
https://drive.google.com/open?id=1ZefUL-J4_nZgBxyUng0CajiQ5kJ0CC55

You might want to contact the support. My miner seems to have the acceptance rate quite evenly spread out.

Maybe... but this just happened on nicehash pool for Quark.
However acceptance rate work evenly spread out on mining for myr-gr on MPH.