These objects are not designed to be used on a single counter. Which is why you are experiencing a visual glitch when using the move objects cheat to combine them. The objects are working by design as they should without using move objects. They are meant to be placed on different counters.
No I'm not fussed about the visual glitch, I'm putting it forward for them to update the items to be able to be used like this, both are accessible by Sims when placed like this there's just a slight annoying glitch that I feel the team could get rid of 🤣 it looks a lot more realistic (mostly for the UK region) to have built in appliances like this look like that :)
What I am saying is that they won't update it to fit all onto one counter. How it is in the game is by design. It is meant to be used on seperate counters.
