Because DOA5U's replay function is rubbish. I've even had offline replays corrupted (Albeit some involved a player pressing pause mid-match but that's besides the point). It also sucks that you can't rewind replays. I saved a replay with another player that involved Rachel's 236P "going through" Ayane's 3PP.
Haha, it's all good Brute. I try to play offline when I can because I don't really gain anything and don't level up as well from playing laggy online matches. I personally am thankful for the people that do come out regularly though such as StrikerSashi (though he too can't stand the laggy bullshit online).
A sparring match with an offline buddy in 270 HP. Somehow Ayane's 4K got crushed despite being a vertical ground-hitting mid =(. GenFu's 3P must have some "godly" crush abilities. Go figure...