Found a possible issue during testing. Some rules had lines like result = result and func(). This essentially makes it to where the func() won't run after 1 error or warning is found. This eliminates some from being repeated multiple times, but also hides when there are multiple different ones at the same time.  "test_b_ii_s_3" in isatab/validate/test_core.py is a good example. There are 2 different columns with warnings, but before this change you only saw 1 of those warnings, but those 2 warnings are repeated for each row.