1366/8 = 170.75
1360/8 = 170
thats your problem, and whoever insisted on these non /8 settings to be marketed for computers needs to be beaten with a rubber hose
so you either cludge it wasting quite a bit of video memory over the entire display for nothing, or it gets stretched
i dunno, if you spent money on this thing I would send it back, you may figure it out now, but 6 months from now on totally different software???
If you got it for nothing or next to nothing do the best you can and be ware of any screen resolution you cant divide by 8