Last modified: 2013-09-26 03:04:42 UTC
The datafiles are regernerated by scripts daily, and the order of the columns in the datafiles might change between runs. This will break user-generated graphs as they are currently relying on column ordering. Discussion with Dan showed that adding ids to the datasources' series might fix the problem.
Prioritization and scheduling of this bug is tracked on Mingle card https://mingle.corp.wikimedia.org/projects/analytics/cards/1173