Board Game Arena

I have an imp assigned to be employee of the month and given the long handled shovel. Should I be able to pick up three old manure and then one new one? If so, how? When I removed three old one, I didn't get the option to use it again after the new manure. I'm wondering if this is a bug or if I'm not understanding the rules. (Maybe https://boardgamearena.com/bug?id=42095?)

When you use the shovel, if you use during a turn when a pet produces manure, you have a button at the top of your screen to grab that newly produced manure. You need to pick both the old and new ones at the same time

Thanks. That's what confused me, and does seem like a bug as the description of the shovel says it can be used at different times during that phase.