Hash rate will be different between the miner and the site. The miner is real time, whereas the site is average shares submitted.
Same goes for the delay in what you see on the site as submitted shares and what your display on the miner reads.
Your rejected share is probably a share submitted after a block was solved. This still happens with LP enabled, just not as frequently.
Hmm another rejected share on my Ufasoft (CPU) miner. So far 2 out of 18 rejected shares which is much higher than I have ever gotten at Deepbit. Maybe I will be better off to do my CPU mining at Deepbit (19Mhash) and GPU mining at ABCPool (389Mhash)? Im going to keep it running for a while longer and if this continues to be a pattern I will have to switch at least that miner.