Using the example quoted below, take a look at v220.127.116.11 and you should not see the jumping anymore.
Cue 1 All Spots Position Straight Front; Dimmer 100
Cue 2 All Spots: Circle (the predefined in Preset 21 All 1) which is Relativ without Absolut Values
Cue 3 All Spots : Dimmer 80
Cue 4 All Spots: Dimmer 60
Cue 5 All Spots Dimmer 40
Hit GO: Spots start to circle but jump back to the starting point when starting Cue 3, 4 and 5
Adding a Fade Time to cue 2 makes a smoth infade for the Phaser. (When your fade time is very long, you can hide the cue change jumps).