Inconsistent workout details for run events

I tried joining a run event a few days ago, and found it a horrid experience.

Using iPhone Zwift companion I chose an event and category suitable for that evening’s workout. Then when I was in the starting pen it reported different interval paces, so I quit and changed category. Choosing an event category is awful on iPad Zwift lis awful, they are tiny and very hard to tap on the correct one. Then having rechosen a suitable category, the intervals in the actual workout when the event started were different again, so I aborted.

I’ve not had time to go back and reproduce an exact defect report. Have I stuffed something up? Is this a know pun issue?