Why is it that my miner shows much more accepted shares than multicoin dashboard? Or do I miss anything

Could you please elaborate on where exactly you are seeing a lower accepted share rate?
Another one: your first post states 0% fee, the dashboard states 2%

I'll edit that here in a second. Just a case of didn't edit.
and ... what about enabling Dogecoin (DOG) or DigitalCoin (DGC)? Looking quite profitable.
Due to the difficulty of those coins, I will not add them until we get more hashrate.
Based on my calculations, it would take more than an estimated 96 hours (at the current 4.2 Mh/s) for a single block of DOG(E), and 4 hours for a single block of DGC.
This is an issue as I want payouts to happen in a somewhat timely fashion and with times like that, it is not timely at all.
If we get more hashrate, I would be more than happy to add it in, but until things can happen at a reasonable rate, I will not.