It's difficult to say exactly why the partition isn't being created correctly. You would need to step through the partition process manually to see which step is failing. You could boot to debug mode and run these commands from your log. Every place you see an empty line, press enter, this will replicate the automated partition process to try and find out which step is failing and why.
fdisk /dev/sda
n
p
1
2048
+1048575
t
83
a
n
p
2
+1341016915
t
2
83
n
p
3
+191573833
t
3
83
n
e
4
+399367706
t
4
5
n
+95784860
t
5
83
n
+95782811
t
6
83
n
+95780762
t
7
83
n
+8380412
t
8
82
n
+95776664
t
9
83
w