What's strange for me is that ad4s4 is an extended partition with a NTFS logical partition in it, yet FreeBSD seems to think it's a UFS partition. You shouldn't have ad4s4a, b, etc. - should be just ad4s4 and ad4s5.
Out of interest, what does "bsdlabel ad4s4" say?
You might want to post to one of the mailing lists and/or file a PR about this...
Out of interest, what does "bsdlabel ad4s4" say?
You might want to post to one of the mailing lists and/or file a PR about this...