Problem(s) Encountered:

...on the last exposure the telescope sent me an approaching limits warning and then immediately said I hit the limit once again. The telescope was not at the normal limit and not even at 
2 airmasses when this occured. I am guessing that me walking the telescope back to zenith this morning caused the limit switches to be confused? Not sure but closing up early to not risk damage to the telescope.

Solution:

Target being observed was north of +70 and telescope ran to more than 5 hrs 30 min west.  I imagine this orientation was over enough to trip the Hg-switches and trigger the horizon limit.  Interestingly, it looks like for large magnitude declinations, the horizon limit hits before the E/W limits.