I found some info on some of inexplicable facts. Well, it is not exactly an explanation, but some infomration
Question: W.E.N.U.S.: Weekly Estimate Net Usage Systems or Statistics?
Answer:
W.E.N.U.S. = Weekly Estimated Net Usage Statistics
A.N.U.S = Annual Net Usage Statistics
Note: Supervising Producer Jeff Greenstein (his comments are indicated by "JG")
JG: "As written in ''Stoned Guy'' [1.15], it was ''Weekly Estimated Net Usage Statistics''. Matthew said ''Systems'' instead of ''Statistics'', but we decided to let it go because basically the joke was over as soon as he said the word ''WENUS''.
"Then, when we did the WENUS/ANUS call-back in ''Two Parts'' [1.16 & 1.17], we decided to go back to ''Statistics'' ''cause it makes more sense -- knowing full well that sharp-eared ''Netters would probably catch us at it."
Quetion: Rachel Green or Greene?
Answer:
It''s been spelled both ways. The credits of any episode where her parents appeared list their last name as "Green." But in "The One With The Invitation," Ross''s envelope to Rachel, as well as her RSVP note, spell it "Greene." Then in episode 10.04, "The One With the Cake," the box with Emma''s cake had "Green" written on it.
Whom shall we assume knows how to spell her name better? Ross and Rachel (or actually, the prop master who prepared those envelopes)? The guy at the cake shop (who didn''t even give Rachel the right cake)? Or the people who prepare the show''s credits? Don''t get too hung up on things like this.
i''ll try to solve some more mystey if possible in future...