The two boards that give 30 asics I just didn't count them and assumed the count in the web interface was correct.
But indeed they have more asic's.
I'm currently focussing on the 2 54 asic boards that i have here (the others are still in my farm), what is see in the interface is this:
http://bitcoin.sa007.nl/brokenornot.png
It has only been running 3 minutes here, but also at 30 minutes it doesn't display any x's.
In case it helps, I have run dmesg via ssh, it is filled with lines like:
[ 111.404733] asic cmd return c3ff09f0
[ 111.408476] chain5 reg crc_r{0x16}crc{0x25} Err ret{0xc3ff09f0}
If I run the same controller with a working 54 asic board, that one stops giving those lines after about a minute and starts mining, the broken board don't seem to start or something.
I still don't have a clue what is happening here.