did i get hacked?  how would they of hacked into my wallet?

hello,

all i see are dates, received with my wallet address and the amount of bitcoins.  i dont know where they are coming from?  some of them are 0.000.  i have different workers spread out across different computers and pools so i would like to know which it came from.

hi,

i'm currently using multibit as my bitcoin wallet and i have several different computers.  i have it installed on my work computer, then i backed up my wallet and imported it to my home computer but it doesnt seem to sync with each other.  so my wallet at my work computer has a couple more transactions than the one i have at home.  are they supposed to sync with each other? 

2nd question is about my wallet for namecoins.  i did some command line and got my namecoin address but thats all i have.  so if i lose that address, i loose all my namecoins?

hi,

i work in IT as a system admin so i'm pretty technical but never encounter fpga or asic.  i'm new to mining and apparently these devices are pretty efficient when it comes to mining.  i emailed 3 different vendors but neither have replied back to me and its been several days.  i'm hoping i can get some questions answered in this newbie forum. 

so before i slap a few thousand dollars down on an asic board, i need to understand how it works and if i would get my money back.  so from researching, i understand that i plug in a power supply to the board and from the board, i plug in a usb cable to my lower power laptop.  launch my mining software (i use guiminer on windows 7) and i can just leave my laptop on 24/7 to let it mine at around 20-60 G/ hash.  around 100x faster than my current GPU (AMD 6870 @ 270 mhash/s)

and if i do decide to get a few of these, does that mean i can solo mine without any issues?