Offerings for the tabernacle

Numbers 7:1 - 89

For those reading along at home did this feel like reading a mial merge file or what?

The only differences I can find in here are in what is said about Judah and what is said about Issachar.

Judah goes first:
(12) The one who brought his offering on the first day was Nahshon son of Amminadab of the tribe of Judah.
He is the only one NOT called out as a leader. Interesting since Judah is the tribe of leaders.

Next is Issachar:
(18)On the second day Nethanel son of Zuar, the leader of Issachar, brought his offering
(19)The offering he brought was...

He is the only one not referred to as the "leader of the people of..." and it says "the offering he brought" rather than "His offering"

Was the author just getting up to speed then standardized after the first two?
Or should we read something deep and mysterious into these subtle differences?

I think I'm going for choice A.
Sometimes the guys who wrote the bible DID look to save time...they were guys.
:)