Planting potatoes

I still have a number of chitted spuds that could be put down but time and space is beating me, however just taken u a few rows of my earlies,so wondering if putting some chitted mains where the earlies have just been is a good idea or best to be avoided?

The earlies themselves were a mixture of medium to small sized however they were plentiful, with only about 10% that were no good. Don't think it was blight but assuming its ok to plant mains where the earlies have been should I avoid because of approx 10% being chucked away or is that to be expected? There were 2-3 potatoes which were the actual seed potatoes themselves which were slushy....any worries with regards that or out of approx 35 is the loss quite minimal its to be expected.