Clallam and Jefferson Transit 1984 Orion I's - Same Order Number?

[Benjamin]

http://www.angelfire.com/ca/TORONTO/builders/orion1.html

Is there any proof as to why the same order number of 177 was used for both Clallam Transit's and Jefferson Transit's orders of the 1984 Orion I? Both orders are for 35 foot long buses (Clallam's being of the older design while Jefferson's was of the then-current design). Could this mean consequently that both sets of two buses (581-582 for Clallam and 848-849 for Jefferson) came with Detroit Diesel 6V92TA engines and Allison HT747 transmissions?

~Ben

Edited June 17, 2015 by Benjamin