Ah, I found the downside to using Twitter website instead of app on mobile: notifications don't allow just mentions. 
I'm a little confused by it as stuff doesn't fit on my screen when I click on people's profiles?
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What do you mean?
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I click on a profile picture, the screen goes dark, I have to scroll down, it's a pop-up but it doesn't even fit on my screen.
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That's strange. This is what happens when I clicked on your profile picturepic.twitter.com/u2bdK1tQgp
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Your screen is bigger?
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I'm on a 13 inch Macbook, though maybe it's because my Tweetdeck window is taking up the entire screen?
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I'm on mobile! Mobile is tiny screen!

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The OP was about mobile. You maybe missed it. Happens to me to.
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New conversation -
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