Anaconda uses too many addresses

The environment here is Fedora 23. One machine acts as DHCP server for 
the others (normal, I know). A small portion of each subnet is reserved 
for dynamic assignment, devices without reserved addresses. Lately, when 
I run PXE on a new machine, I find that three or more of those addresses 
are reserved for Anaconda! Even though all the requests originate from 
the same MAC address, the DHCP server gives each request a unique 
response. As the address leases take time to expire, I quickly run out 
of available addresses. Much more quickly than I should.

I don't recall this happening when doing the same operations on a Fedora 
20 base, both DHCP server and PXE installations.

I realize this may be a DHCP issue. But to cover all bases, I wonder if 
there is anything Anaconda is doing that could exacerbate this problem.
-- 
Dave Close