Custom run changes once in Zwift

I have create a ZWO file with the following contents, but when it’s displayed on my Mac and AppleTV in Zwift the distances have all changed to 600m warmup (should be 500m), 800/400 intervals (even though supposed to be 800/320) and cool down of 600m (s/b 500m)

What have I done wrong?

(leading “<” have been replaced with periods)

.workout_file>
.author>Author
.name>10K - Intervals - Speed
.description>. Work/Total distance 9.6km/14.4km. Work/Total time 55min/1hr41min using the following paces (~ are estimated): Mile~8:30; 10k~59:22; ./description>
.sportType>run
.workout>
.Warmup Duration=“500” PowerLow=“0.63324497” PowerHigh=“0.63324497” pace=“2” >
.textevent message=“Begin intervals” /> ./Warmup>
.IntervalsT Repeat=“12” OnDuration=“800” OffDuration=“320” OnPower=“1.03894497” OffPower=“0.63324497” pace=“2” >
.textevent message=“Begin cool down” /> ./IntervalsT>
.Cooldown Duration=“500” PowerLow=“0.63324497” PowerHigh=“0.63324497” pace=“2” />
./workout>
./workout_file>