Well maybe I'm forgetting something else. The procedure that i followed for minitoring is this:
1-All workers are stoped, a window with LP broadcast awaiting for the announcement that a block is found, the counter is reseted to 0 shares.
2-When a block is found i take note of the time to identify the first block later in pool stats, i start minig, automatically starts the counter...
3-For some hours i take note, for each block anounced in the LP broadcast, each begining an end time, amount of shares submited for each block.
4-Later after a few hours, i wait for a last block announcement, when it is announced i stop minig.
5-Wait for stats update, and when i see a none announcement in the statis begin to compare....
What is missed here?
LP occur anytime anyone in the network (not just DeepBit) finds a block.
LP can also occur for non-block reasons like including a valuable transaction (high fee), change NMC header (not used by DeepBit), a server side issue,etc.
LP *may* only issue LP when a block is found but that is a bad assumption to make AND even if it is valid an LP will be issued on any block that is found (by any pool or solo miner).