Corrected entry: Phoebe, as an empath, senses Chris' love for Bianca when he's passed out. But in "Loves a Witch", Chris drinks an empath blocking potion so that Phoebe can't sense his emotions. Even earlier on in this episode, Leo asks if she can sense anything from Chris and she replies, "From Chris? No, I can never sense anything from him." So how could she have sensed his emotions at that moment?
Corrected entry: In this episode the Charmed Ones see Bianca when she is little and when she is grown. When she is grown and from the future, she is the same age as Chris it would appear, even though we don't know her age. Chris is 22. As a child, Bianca looks like she is 7, that would make her 29. How would they have gotten together?
Correction: The little girl (Bianca) could easily have been 4 or 5. While it might be unusual for a 22 year old guy to date a 26 year old woman (Future Bianca could easily be 26 or 27), it's not impossible or unheard of. Also, Bianca is a Phoenix witch; perhaps they age differently. Demons through the series seem not to age as mortals or good witches do (Cole is a prime example). Bianca has the (demonic) power to "shimmer" (which no "good" character has done in the series, unless you count Cole-as-good while he still had his demonic powers) and Chris implies in the future flash-forward that before they met, she was a ruthless killer (Phoenix witches are bounty hunters, so it makes sense they are more similar to demons than they are to good witches).
Corrected entry: In the Book of Shadows it says that a Phoenix is a coven of witches who are reborn; however in series four, episode "Bite Me" Piper and Phoebe are looking through the book of shadows to see what could have bitten Paige. When Piper suggests a phoenix, Phoebe says it flies but it doesn't fight.
Correction: The Phoenix referred to in "Chris-Crossed" is the name of a coven of witch-assassins, not the mythical flying bird mentioned in "Bite Me".
Correction: Chris' future fiancee had drained his powers, he was in a unconscious dying state, this could have counteracted the potion, if you take into consideration how strong Pheobe's powers are as a charmed one.