This is my first Pro iPhone and I may be in over my head. I upgraded from an XR. I routinely share photos on Instagram. Now, however, with the Pro my file sizes must be too large for Instagram to accept in the manner I use to share. I click on my photo, click the up arrow and select share to Instagram. It accepts the photo, BUT something very unusual happens next. A duplicate, but much smaller file size, photo ends up in my Photo Library. Now I have two images of the same photo. Why am I getting a second image? Is Instagram doing this, or my 16 PRO? This has never happened until I got this new iPhone. There are a lot of settings and I’ve watched several YouTube videos trying to understand the settings. But, I cannot figure out what is going on here. Can anyone tell me, simply?