Wrong mac address from stack SG500?

Hi,
It's my connection scheme.
There is a routing problem between vlans if one of the devices connected to the unit 2.
Within the same vlan devices are available for each other.
If PC200 connected to Gi1/1/15
Sniff ICMP traffic on Gi1/1/15:
Icmp request from 192.168.112.1 to 192.168.101.200:
Src: 24:01:c7:08:02:49 (192.168.101.254),
Dst: b8:88:e3:0e:1a:da (192.168.101.200)
Icmp replly from 192.168.101.200 to 192.168.112.1:
Src: b8:88:e3:0e:1a:da (192.168.101.200)
Dst: 24:01:c7:08:02:49 (192.168.101.254)
If PC200 connected to Gi2/1/15
Sniff ICMP traffic on Gi2/1/15:
Icmp request from 192.168.112.1 to 192.168.101.200:
Src: 24:01:c7:08:00:01 (192.168.101.254),
Dst: b8:88:e3:0e:1a:da (192.168.101.200)
Icmp replly from 192.168.101.200 to 192.168.112.1:
Src: b8:88:e3:0e:1a:da (192.168.101.200)
Dst: 24:01:c7:08:00:01 (192.168.101.254)
Where does this mac-address (24:01:c7:08:00:01) appear? In the arp table on PC200 it is none.

Hi,
With firmware 1.3.0.62 the same problem.
If the interface Gi2/1/15 to down and up - the first two icmp request has a source MAC
24:01:c7:08:02:49, remaining request has a source MAC 24:01:c7:08:00:01.
#show stack
Unit Model Name     MAC Address       Software Master   Unit No./       Status       Mode After Reboot
1    SG500-28       24:01:c7:08:02:49   1.3.0.62 Enabled         1,            master              Native
2    SG500-28       24:01:c7:08:02:2c   1.3.0.62 Enabled         2,            backup              Native

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