[Open] Items with energy bonus don't always work with other items

Thank you, for answering me! Yes, these two items add +1 energy recharge to toilets, according to their description.
I had the spawesome toilet(this add + 1 energy recharge to toilets), spawesome vanity(this add +2 energy recharge to toilets), and the plush paper roll (+1 energy recharge to toilets), so these altogether with the basic 2 energy, recharge my sim’s energy with 6.
And then I bought the soap and the hand towel, because these items add 1-1 plus energy recharge to the toilets, but no, the toilets still gives 6 energy to my sims when they use it. I don’t know, if this is an error or something...
Thank you!