Virtual Texturing Feedback

Something is certainly wrong with VT and landscape, but I can not figure out, what exactly. Here is the comparison image. On the left, I use large 16384x16384 texture; On the right, same texture, bus stream from 2048x2048 chunks (using fix supplied above to fix Y rotation); Now, on the left, single 16384 texture is applied normaly. On the right, one stream as chunks, is applied with some odd offset.