I might be missing a setting or something, but I am not seeing more than 20 forum posts. I don't see a next page button or something similar. There are posts showing on the trending line, that are not showing in my feed. I know there has to be more than 28 posts in the Windows phone section.
The "front page" or homepage of the Windows phone space only shows so many discussions. If you want to see more of them you need to view the Content page of the space. Unfortunately the last couple of designs for the community have hidden the link to the Contents page for the individual spaces. It is still available. You just have to add "/content" without quotes to the end of the individual space's homepage. The overall Contents page can be found under the Browse link on the Verizon Wireless Community forum homepage. The link is https://community.verizonwireless.com/content for your reference.
I really would like the Content page of each space be add back or make easily accessible from the individual spaces homepage.
I'm most definitely NOT a VZW employee. If a post answered your question, please mark it as the answer.