Confusion about license wording

["Suraj N. Kurapati" <skurapat@ucsc.edu>]

Hello,

In the conditions paragraph below, I am wondering whether:

(1) The last sentence is necessary (i.e. does the word
"corresponding" in the first sentence imply the last sentence?).

(2) In the last sentence, does the phrase "must reflect all
modifications" mean that all past, present, and future modifications
must also be included?

I think that including past modifications is prohibitive and
including future modifications is impossible.

--------------------------------8<------------------------------------

All copies and substantial portions of the Software (the "Subsets")
and their corresponding source code (the "Code") must include the
above copyright notice and this permission notice.  The Subsets must
be distributed with the Code or with information on how to obtain
the Code for no more than the cost of distribution plus a nominal
fee.  The Code must reflect all modifications made to the Subsets.

--------------------------------8<------------------------------------

Thanks for your consideration.