Not sure what you are talking about. You can view any log from any date the limitation is one year at a time.
In other words you can view 2012-2013 but not 2012-2015.
The users in this thread experienced a bug in OSPi Python program which incorrectly escapes the JSON data causing the app to not read the data. The problem has been fixed but users who already had bad data had to delete the offending lines or simply delete the entire log file.