Extend treble clef stem into bass clef

In bar 83, I've been unable to extend the first C stem into the bass clef. I THOUGHT it was highlight stem, shift +, then pull down and save. I got the next two stems extended between staves, but am absolutely stuck on this one.

I appreciate your help, Wizards. Thanks! <3

I got it. Because I had moved the notes and stems, they weren't lining up exactly. Everything is fine now. Thanks for always being here! <3