Custom equipment shows up in irrigation schedule even though it is not placed in drawing

I've created a custom wye strainer under the Filtration option of the Auxiliary Equipment section of the Irrigation Manager. Before placing the block in my drawing, I reloaded the irrigation schedule to update some other information and the custom wye strainer showed up on my schedule. I then deleted the irrigation schedule from my drawing and the custom equipment wye strainer from the Land F/X Irrigation Manager. I followed that up with a PRG, save, and exit. Upon opening the drawing again, I created the wye strainer again, inserted a new irrigation schedule, and the wye strainer still shows up even though the block is not placed in my drawing. Maybe I'm missing/skipping a step somewhere or created the custom equipment incorrectly? Please see the images below for reference.