Why won't my screen respond properly?

I recently had to replace my LCD and Digitizer after I broke the screen. I've gone through 4 screens now, 2 of them were from a cheap place and while the digitizer portion worked 100% the LCD was distorted so I ended up returning both of them and got a screen from iFixit, this time while the LCD was crystal clear the touch function was acting up a bit. As in it didn't respond to the tips of my fingers, just the centers, unless I pushed down very hard or slid my finger from the center to the tip. After explaining the issue another screen was sent out to me. After plugging this one in it seems to be doing the same thing, though, not as bad. It now responds to the tip of my thumb but no other finger tips seem to work, this makes it quite hard to type, it also seems to not respond to tapping as well, I sometimes have to tap multiple times for it to register correctly. I tried all the suggestions, cleaning the contacts and restoring my phone and reseating connectors to no avail. I was playing with it earlier and while I had the screen pulled away from the back of the phone it was working correctly for a bit but once I had placed it back into the phone, it reverted back to the way it was acting before. I don't see any damage in the cable ribbons or the connectors themself. I know its not the phone because like I said before the cheaper screens work perfectly for their touch parts. Any ideas?