PowerConnect 5548 time questions

I have a 5548 with this configuration information in it:

switch1# show bootvar
Unit  Image  Filename   Version    Date                    Status
----  -----  ---------  ---------  ---------------------   -----------
1     1      image-1    4.1.0.19   11-Jun-2015  10:11:17   Not active
1     2      image-2    4.1.0.20   18-Aug-2015  11:35:45   Active*

Clock-specific configuration lines:

clock timezone EST -5
clock summer-time EDT recurring usa
clock source sntp
sntp unicast client enable
sntp unicast client poll
sntp server poll
sntp server  poll
sntp server  poll
sntp server  poll
sntp server  poll

The 5 servers are all NTP stratum 1 servers directly connected to the switch.

switch1# show sntp configuration
SNTP port : 123 .
Polling interval: 1024 seconds.
No MD5 authentication keys.
Authentication is not required for synchronization.
No trusted keys.

Unicast Clients: Enabled
Unicast Clients Polling: Enabled

           Server              Polling   Encryption Key
----------------------------- ---------- --------------
                  Enabled      Disabled    
                  Enabled      Disabled    
                  Enabled      Disabled    
                  Enabled      Disabled    
                  Enabled      Disabled    

switch1# show sntp status
Clock is synchronized, stratum 1, reference is , unicast
Reference time is dda935fb.73d89cbb 02:02:19.0 EST Nov 5 2017

Unicast servers:

    Server       Status      Last Response     Offset   Delay   
                                               [mSec]   [mSec]  
--------------- --------- ------------------- --------- -------
       up     02:02:19.0 EST Nov    3600xxx       0    
                             5 2017                                
        up     02:02:19.0 EST Nov    3600xxx       0    
                             5 2017                                
       up       02:02:19.0 EST Nov    3600xxx     -1000  
                              5 2017                                
       up       02:02:19.0 EST Nov    3600xxx     -1000  
                              5 2017                                
        up      02:02:19.0 EST Nov    3600xxx       0    
                              5 2017                                
(where xxx is some random number of milliseconds).

Once we left DST on Nov 5th, the "show clock" command showed the time was off by one hour, but it had the right timezone.

Two questions:

- To get the right time after we transitioned to EDT, I had to manually enter/change the time, even though it showed the right timezone.  Is there something wrong with my configuration?  It doesn't appear to be since the "status" command above showed the local clock was off by 1 hour.

- The red text in "show sntp status" above says stratum 1, but it should be stratum 2.  Is that a bug?