Soft Limits and Alarm 2

I am setting up my new 4x4 Altmill and I am having a problem surfacing. If I try to set up a manual surfacing path by creating a 48" x 48" square in Carvco, when I try to verify it in gSender, I get an error (Alarm 2) that I am exceeding my soft limits. This is strange because according to the soft limits, the bed is ~49 x 49. Why am I getting this error?

I also repeated this, this time with a 24" x 24" square and got the same alarm. This tells me somehow the soft limits are incorrect.

Thanks,

Jim