Sherwoody,   From what I am seeing i don't see a way to change it as a setting, so you may want to try general mode and also make sure that the ip address is in the right subnet for vlan 10.  On a side note the X1000 is more of a value switch, so it doesn't have all the functionality/cli of other switches.   Let me know if this helps.    
I have multiple VLAN (VLAN1, VLAN10, VLAN20) at the office, and the pfSense DHCP server runs on VLAN10, it appears Dell x1000 series only allows VLAN1 as management VLAN, so as soon as I set the incoming packet as tagged with VLAN10 as mgmt VLAN, I lost the access to the switch, I cannot manage the switch UI/CLI, nor can I ping the ip that was assigned if I uses untagged. Steps to recreate Is there anyway that I can set up the x1000 to use VLAN10 as mgmt VLAN?
Dell x1000 series switch: cannot change management VLAN