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You have in fact trained your pup to use the rugs as toilet.
When you teach him to go on those training pads, it’s quite “logical” for him to classify your rugs as just another form of training pads. So he senses a need to go, finds the rug and does what he thinks he’s supposed to do. Outside, inside - a balcony is close enough to a room to be “the same” for ...
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Just give the puppy some time. What you described sounds pretty normal. She clearly wants out, just lacks the necessary control for now.
However, here's a simple idea you can try. It depends on the dogs intelligence and won't necessarily work with all breeds:
Get a small bell, put it on a band and hang it somewhere close to the door in a way allowing you to ...
2
It sounds like he needs encouraging
Place the dog in the middle of the stairs. Put a treat on the top step only, and encourage him if/when he decides to walk up the remainder of the steps.
If you want him to go down the stairs, repeat the process above except place him on the stairs facing downwards, with the treat on the first step
Eventually, you can ...
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