[asterisk-dev] socket_read: Packet arrived out of order (expecting 2, got 1)

[Maurizio Marini]

Mar  7 17:36:34 DEBUG[8789]: app_queue.c:471 changethread: Device 'IAX2/200' changed to state '1' (Not in use)
Rx-Frame Retry[Yes] -- OSeqno: 001 ISeqno: 001 Type: IAX     Subclass: REGREQ
   Timestamp: 00093ms  SCall: 27875  DCall: 00002 [82.59.2.219:10047]
   USERNAME        : 200
   REFRESH         : 60
   MD5 RESULT      : e18a61fe8b0b5363bba16e12c91d9bb8

Mar  7 17:36:34 DEBUG[8703]: chan_iax2.c:6515 socket_read: Received packet 1, (6, 13)
Mar  7 17:36:34 DEBUG[8703]: chan_iax2.c:6557 socket_read: Packet arrived out of order (expecting 2, got 1) (frametype = 6, subclass = 13)
Mar  7 17:36:34 DEBUG[8703]: chan_iax2.c:6564 socket_read: Acking anyway
Tx-Frame Retry[-01] -- OSeqno: 001 ISeqno: 002 Type: IAX     Subclass: ACK
   Timestamp: 00093ms  SCall: 00002  DCall: 27875 [82.59.2.219:10047]
Rx-Frame Retry[ No] -- OSeqno: 002 ISeqno: 002 Type: IAX     Subclass: ACK
   Timestamp: 00111ms  SCall: 27875  DCall: 00002 [82.59.2.219:10047]
Mar  7 17:36:34 DEBUG[8703]: chan_iax2.c:6515 socket_read: Received packet 2, (6, 4)
Mar  7 17:36:34 DEBUG[8703]: chan_iax2.c:6612 socket_read: Cancelling transmission of packet 1
Mar  7 17:36:34 DEBUG[8703]: chan_iax2.c:6621 socket_read: Really destroying 2, having been acked on final message

is this alarming?
or should i discard this and do not worry at them?
TIA
	--maurizio