These sould be Vita only games, detected as PS3 games on Playnite. I think these games aren't croos-buy games, where you can download PS3 version when you buy them (Hotline Miami for example)
A virus named Tom: #DLIST#EP1920-PCSB00955_00-G000000000000877
Everybody's Golf: #DLIST#EP9000-PCSF00006_00-0011223344556677
I think the problem is that those games have Vita and PS3 listed as supported platforms in the data source we use for import, and I made it so PS3 has higher priority since you can only assign one platform to a game.