Thanks for taking the time to evaluate LogViewPlus.
The first issue is fairly common and indicates a problem with your parser configuration. Usually, this occurs when the date format is wrong, or the log entry is not in the format expected. For example, it may be because the exception entry does not have the expected number of columns.
Can you please send me more information on how you are parsing this file? In particular, the configuration pattern you are using.
The second issue is tricky. Not all of your log entries have an exception and there does not appear to be any clear way to differentiate between messages and exceptions. Also, LogViewPlus does not support optional fields. So I don't think this will be possible for this log file.
Currently, LogViewPlus cannot take variations into account when grouping. What I would recommend is using a filter to isolate these entries and then creating sub-filters as needed. I will have a look into how we can improve this in the future.
Hope that helps. Please let me know if you have any further questions or issues.