The switch is using it's last used ramp rate.
I can reproduce this on any Switchlinc Dimmer or LampLinc.
The only thing that is consistent is that the light always goes to 100% regardless of what the local dim level is set too.
Strange. I've observed the same behavior in a new ICON dimmer switch I installed, except that it also uses the last used dim level as well as the last used ramp rate. I don't recall this issue happening in the past with SwitchLinc Dimmer V2s or LampLinc 2s I've installed, but my recollection could be faulty and not the switches.
Are you certain this occurs with all SwitchLincs and LampLincs?
To me this seems a bug and not a feature. I don't recall reading about this behavior in the documentation. The switch should always use the pre-programmed dim level and ramp rate when operated at the switch, not the last level or rate used by a remote device.