DHCP Requests over Nexus Issue

Question

Hello all, this is my first post so please be gentle.  I am having an issue with DHCP requests on our new server network.
First some background:
The new network consists of 2x Nexus 5548UP runing NX-OS 6.0.  Behind the N5ks are multiple FEX types, but for the purpose of this issue I am using 2232TM-E FEXs.  Each FEX is setup in an active-active scenario, therefore each individual FEX port belongs to each N5k which are configured identically.  The N5k have a vPC peer-link setup between them and each FEX is also setup with vPC.  The N5ks are uplinked to a pair of Catalyst 4500X switches that function as our "core" switches.  From there, we have our old network which consists of a pair of Catalyst 4507R switches.  We use tansfer networks between the N5k and 4500X and between the 4500X and 4507R runing EIGRP.
I have "Server A" on VLAN 100 connected to FEX 2232TM-E... "DHCP Server B" is on VLAN 11 connected to 4507R.  I have "ip dhcp relay address x.x.x.x" configured on VLAN 100 to point to DHCP Server B on the old network.  VLAN 100 is configured with HSRP (see running-config output below).
Onto the issue:
Server A is not getting a DHCP addesses assigned to him.  The DHCP Server B gets the Discover packet from Server A and sends back the Offer... but the Offer either never makes it to Server A, or Server A Request never makes it back the DHCP Server B.  I am not sure which is the case exactly.
I know it may be hard to picture the whole scenario I described above, but any pointers would be greatly appreciated.  I'll be glad to dig up a good diagram of the network or provide more configs if necessary.
Additional info:
version 6.0(2)N1(2)
feature dhcp
service dhcp
ip dhcp relay
N5k #1:
interface Vlan100
   description server vlan
   no shutdown
   no ip redirects
   ip address 10.112.100.2/23
   hsrp 100
     authentication text hsrp-100
     preempt delay minimum 180
     priority 200
     ip 10.112.100.1
   ip dhcp relay address 172.26.20.40
N5k #2:
interface Vlan100
   description server vlan
   no shutdown
   no ip redirects
   ip address 10.112.100.3/23
   hsrp 100
     authentication text hsrp-100
     preempt delay minimum 180
     priority 150
     ip 10.112.100.1
   ip dhcp relay address 172.26.20.40
Thanks for any information!

Answer 1

Here are the results of a tracert from a server in VLAN 11 to the gateway for VLAN 100:
K:\>tracert -d 10.112.100.1
Tracing route to 10.112.100.1 over a maximum of 30 hops
   1    1 ms    1 ms    <1 ms  172.26.20.243
   2    <1 ms    7 ms    4 ms  10.112.96.105
   3    <1 ms    2 ms    2 ms  10.112.100.1
Trace complete.
Here is a tracert from a server in VLAN 100 (staticly addressed) to the gateway for VLAN 11:
K:\>tracert -d 172.26.20.1
Tracing route to 172.26.20.1 over a maximum of 30 hops
   1    <1 ms    2 ms    2 ms  10.112.100.3
   2    <1 ms    6 ms    7 ms  10.112.96.73
   3    1 ms    <1 ms    <1 ms  172.26.20.1
Trace complete.
Does this help?  Or do you need more specific switch config information?
Also, I've attached a basic drawing of the network for reference.  I've ommitted all the IP information, just a visual representation of the connectivity.