I use log4perl in most of my scripts, have to admit I've never used the filters. Does it work for you if you remove all the filters, and simply log everything together? i.e., something like:
log4perl.logger=INFO, FatalFile, FatalMailer, InfoLog
log4perl.appender.FatalFile=Log::Dispatch::File
log4perl.appender.FatalFile.filename=test.log
log4perl.appender.FatalFile.mode=append
log4perl.appender.FatalFile.layout=PatternLayout
log4perl.appender.FatalFile.layout.ConversionPattern=%d %p %F{1}:%L %M
+ - %m%n
log4perl.appender.FatalMailer = Log::Dispatch::Email::MailSend
+mail
log4perl.appender.FatalMailer.to = webmaster@mysite.com
log4perl.appender.FatalMailer.from = log4perl
log4perl.appender.FatalMailer.subject = Something's broken!
log4perl.appender.FatalMailer.layout = SimpleLayout
log4perl.appender.InfoLog=Log::Dispatch::File
log4perl.appender.InfoLog.filename=mailer.log
log4perl.appender.InfoLog.mode=append
log4perl.appender.InfoLog.layout=PatternLayout
log4perl.appender.InfoLog.layout.ConversionPattern=%d %p %m%n