[Users] registration wierdness on single contact to be returned

Hi, i have configuration of registrar module as: modparam("registrar", "nat_flag", 20) modparam("registrar", "use_domain", 0) modparam("registrar", "desc_time_order", 1) modparam("registrar", "append_branches", 0) modparam("registrar", "max_expires", 3600) This because i want to have only the most recent contact to be retrived on location. The problem is that the client with public ip (the 2. row) is every time preferred to the behind nat one although the behind nat one is the last one to make/update the registration. I'd like to know in which way are ordered the records in location table, which difference make the nat flag and if the choose is made on the last updated/inserted record or the last that expire. This is what is registered on the location table for user 777654321 : *************************** 1. row *************************** username: 777654321 domain: contact: sip:777654321@192.168.30.200:5060 received: sip:193.45.98.211:15397 expires: 2006-03-24 13:46:58 q: -1.00 callid: FA900625953C490B80D1679605057052(a)mysip.domain.com cseq: 21374 last_modified: 2006-03-24 12:46:58 flags: 1 user_agent: X-PRO build 1082 socket: 193.76.98.23_5060 *************************** 2. row *************************** username: 777654321 domain: contact: sip:777654321@193.45.35.76:5060 received: NULL expires: 2006-03-24 13:22:22 q: -1.00 callid: dc626ada088ed5f38bd4d182b9cf3167(a)mysip.domain.com cseq: 570534571 last_modified: 2006-03-24 12:22:22 flags: 0 user_agent: Patton SN4524 JS EUI MxSF v3.2.7.44 00A0BA01BB96 socket: 193.76.98.23_5060 *************************** 3. row *************************** username: 777654321 domain: contact: sip:777654321@193.24.87.95:5060 received: NULL expires: 2006-03-24 13:20:04 q: -1.00 callid: 0192d72378dac66b000c579f6237bad6(a)mysip.domain.com cseq: 586618969 last_modified: 2006-03-24 12:20:04 flags: 0 user_agent: Patton SN1400 MxSF v3.2.7.36 00302B005C98 socket: 193.76.98.23_5060 3 rows in set (0.01 sec) ************************************************************** Thanks, Bye, Marcello