do you have a beta user thread going for bug reports?  I have found a few glitches and some work arounds.  For instance, splitting hash rate between minsty pools on SHA seems to work fine for my rigs, but adding an external pool seems to throw it into 100% rejects.  Same external pool will work fine if you point 100% to it.  Also many times when do that, it will hang and not work getting all rejects.  I have found that restart cgminer on the rig fixes it, and the problem looks like 10.1K diff and all discarded on the rig side.  After restart the diff will go to more normal size like 1.1k on my S5's and hashing will resume..  I also catch it on rentals who rent my rig.  They try either a non working pool or to split it in a way that puts it in this state.  If i do not catch it they can be stuck for hours with zero hashing, restarting cgminer for them fixes. 

Solo mining pools also have very hard time if put into a split hash rate, but seem to work ok at 100%.  Terraminer rigs seem to work only on mintsy pools, and will not hash on external pool if split or not. 

And also I would really like to know if and when rental payments will be released, or what exactly is happening with that?