Ah. I don't know what tradeoffs they were going for, why they needed so many capacitors, or why they placed the varactor there specifically.
It's not like the emitter is an ideal output. At these frequencies, everything has reactance, everything interacts. So, in general we should expect that connecting the varactor pretty much anywhere there, will have some effect.
You've also cropped out the surrounding circuit, and component values (or they're on a completely separate sheet, I hate so much when they do that

), so I can't tell which capacitors are bypass or anything. Even bypass capacitors can have some effect, not so much at 10MHz, but at the ~100MHz in what I assume is the RF/LO front end, elsewhere, even mere lead inductance has noticeable effect.
Tim