Fb question about cover photo!?

[Hannah]

Ok so i put up a picture for my cover photo on my timeline using my laptop. On the laptop screen, the cover shows up perfectly showing everything in the picture (it has a quote). But when i check on my iphone, the cover photo on my timeline is cut off, you can barely read the quote..? Whats going on? Which view is the right one? Is my phone just acting funny or would i have to change the position somehow so it can show up evenly on both? Pls and thx