There should be a jetpack item from Modular Powersuits that is attached directly to the power armour like all the other upgrades for it are. IC2's jetpack taping is unrelated to the rest of MPS and shouldn't really be supported for its power armour. Ultimate Reloaded didn't replace the tape recipe too, so all the recipes that appear use it are a little misleading in that they can't be used as the item (and therefore feature) is disabled.
Appreciate the response! Wish it wasn't the case, makes things a little more confusing, but as long as there are ways around it, I'm good. Glad to have a solid answer on this.