Why these splotches??? =(

[SueZB]

Hello, I am a newbie. I joined because I got a cute phal from Lowe's. It looked so sad so I brought it home, repotted it into a larger pot that drains, watered it (little guy was bone dry in the humid, scorching Houston heat next to a large window) nipped a couple stems whose flowers had fallen and then an hour or so later I see these splotches on the leaves.

I know you should wait til flowers fall before re-potting but I wanted to move it to s pit that drained.

Please help!