HI, i am really struggling with adding csv files from all my transactions. I tried adding csv from bitcoin wallet, adding from exchanges. I get the same problem all the time, its a time stamp issue, what am i doing wrong?

I have been trying to do this all week. really frustrating. COIns also double up on my myetherwallet every time i remove the trade manually, it comes back as saying i own double or still own the coins, I cant get it to 0 as i have sold a bunch of them through etherdelta exchange. Problem is the bunch i have sold are the most profitable or expensive to buy.

HELP??