Since you do not directly write to an extended partition, but only the the logical partitions inside the extended, then the warning on extended partitions does not matter. And it only matters on new 4K or SSD drives and is not really important on older drives.
I have seen the Partition outside of disk error, but it looks like an extraneous error. Not sure if from BootInfo, script or parted, but I think it is just a bug.
Some BIOS need a boot flag, but you have one. You should not need a NTFS partition.
I think your BIOS is showing drive. But sometimes it is not intuitively obvious how the move the second entry to be the first in the drive order. Perhaps manual has info. Sometimes arrow keys, sometimes spacebar or tab move things around.