Hi, there! Glad to help you all anytime. Feel free to ask about anything. 
- Yes, only one attribute is displayed because capabilities should be used for one function and a device can wrap several functions. In this case, 5 switches mean 5 functions because they would turn on/off different components.
- A capability can be used several times in a device if it is included in different
components.
For DTHs, thereās an open issue about using custom device configurations with multiple component devices (only the āmainā component is displayed).
If you want to use components and your integration is cloud-connected, I suggest you use ST Schema. - Our team is aware and keeps working on this matter. Right now, the presentation doesnāt take long to update, you just need to make sure your device is using the correct one. (See the checklist I shared some while ago).