Location of my cell signal

I started noticing that when browsing the web or sending and receiving texts and emails, my speed has slowed considerably. I installed a speed test app suggested by my carriers tech support and ran it. It showed my signal coming from a different part of my apartment complex. I then installed two other speed test apps to see where they showed my signal coming from. One app showing the wrong location is one thing, but if all three do, then I thought there might be an issue.

Since installing them, all three apps consistently show my location as either in another apartment building in the complex or sometimes from the strip mall about a block away. If, however, I run the apps when I’m away from my apartment, they all pinpoint my correct location.

Any ideas as to why the apps all show my signal as coming from other places when I’m at home in my own apartment but show my exact location when I’m away from the apartment?