I've been solo mining for around 2 hours ... got mined up 25,000 hic ... but ... puff ... all gone ... except just 2 blocks that stuck ... 1,000 hic

so many rejects ... some accepted but gone ... and some never register ... why?

I'm using cgminer ...

if all blocks that I mined counted ... including blocks that are accepted and suddenly disappear to nowhere ... I already mined around 30,000 hic ...

but ... right now I've got only 1,000 hic or 2 blocks for me ...

is everybody that solo mined experienced the same thing as me?