What's wrong with what you described? If you aren't stunned then my understanding is that you just have to be back in the spot you started casting in order for a spell to not be interrupted. It's pretty normal to start casting in a corner, run around, then run back to the corner to complete the spell.
As for ducking/jumping interrupting casts, I have no idea when that was supposed to go in.
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Project 1999 (PvE):
Giegue Nessithurtsithurts, 60 Bard <Divinity>
Starman Deluxe, 24 Enchanter
Lardna Minch, 18 Warrior
Project 1999 (PvP):
[50 (sometimes 49) Bard] Wolfram Alpha (Half Elf) ZONE: oasis |