[chirp_users] New Chirp User ???

I'm a new user to Chirp & have a Baofeng UV-5RA (BFB297). I'm using the Chirp Daily Build from 20130111. A few questions: --Is the Freq. on the spreadsheet the TX or the RX Freq.? --On all Channels but where I've put a Tone of 151.4, it displays 88.5, --Also shows 88.5 on ToneSql, 023 in DTCS Code & DTCS RX Code, --What is DTCS Pol which shows NN on all channels, --Is there a source I'm not aware of that explains the meaning of each Column? Some like Name, Tone Mode, Duplex, Offset, Mode, Power, & Skip I know but others I don't. 73s & thanks, Bill