Old question, but still I found it searching for workarounds. Actually there is a limit on UF's, 10 blacklist entries per stanza within inputs.conf. I've hit the limit and for some reason my regex searches cant be combined. Namely those constructed like blacklist = Message="myregex"
E.g. Blacklist1 = Message ="myregex"|EventCode="eventcode#" Message="Myotherregex" | etc does not parse. Only on separate lines do they work. It's this reason I've hit the limit.
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