Am I Doing Something Wrong?

Just make sure the albums are coin safe. Only touch the edge of the coins and use common sense when handling and storing your coins.
John1

If it is PVC don't use it. The softener in PVC eventually eats into just about anything. I used those soft vinyl flips (PVC) in the old days and regret it.

I also collect old fishing lures and somebody started selling PVC surgical tubing as a "hook protector". You slip a small piece over the hook point and it stays put. It will protect your fingers but not the lure. The PVC will eat into the paint of the lure and drastically reduce its value. Takes longer to wreck a coin but avoid any soft plastic. And after decades PVC will turn to goo.

Here is an example of a lure that had PVC tubing over the hooks. Ate right into the paint down to the wood and ruined a minty lure.

if you are collecting common coins from circulation to fill an album its not going to matter as those coins will most likely have no real value even 50 years out. my recommendation is to get in the habit of holding your coins using the rims to make it a habit and fill those albums. there is no better feeling than to pop a coin into a hole and seeing them next their siblings in a folder.

Happy Hunting!