Issues with Dr. Brown's Bottles

So, I have a few different bottles the I use to feed my little nugget when I pump because I wanted to see which ones I like best. I recently bought some Dr. Brown's bottles cause I feel like she's been spitting up a little more than usual lately, so I wanted to see if they would help. My issue is that they leak SO EASILY. No other brand I use leaks at all. Not a drop. Does anyone else have this problem, or is it just me? 🤔

Also, I see no difference in her spit-up using these bottles compared to any other brand we use.