As ChadD stated, never use NTFS as your /home partition.
Also, there is a non-free software suite that absolutely can enable read-write support for EXT4 in Windows, which has a trial period that you can test for yourself. That's the route that I might end up taking so that I can merge /home with user folders in Windows to some degree, stuff like media and downloads.
I've done this under Windows, but the software I used was totally free, no trial period. Search for Ext2Fsd.
I tried it- claims support for EXT4, in practice I didn't have much luck. The paid stuff worked flawlessly for the trial period, and at US$20, well, that's not a hard sell if it's something you're going to use.
I admit, I haven't used in about 12 months, but the last time I used it, it worked brilliantly. That's a shame as it was really good software.
If that's the case then I should probably try it again- I can't say what the problem was, just that the paid stuff worked.