What´s wrong with yobits execution time?

Dear Fellas,

It´s now many days in a row that I see the following:

I put a buy order pretty high over the lowest ask price, and wait for it to execute.
5-10 seconds later, the price has gone beyond the point of my order, and I have to cancel it - or it´ll execute on a downtrend instead.
If I look at trade history, I see that there were no bidders with a higher price than mine for the next 5 seconds from the point that I have received order confirmation from yobit. I have taken into account the 4 seconds difference in time between my computer and yobits time.
In some earlier cases, I could see in the history that somebody had placed a higher bid than me at the same time, in which cases it makes sense that my order is not getting executed but what´s happening now I just don´t get. Are their systems simply so limited and bottlenecked that even if you´re before other people with your bid, some sort of randomization may have you end up in the back of the queue instead?

I hope others can confirm this oddness, and perhaps even know a workaround for it...