I've really never had a problem like you are describing with cribs or high chairs except the crib when I had IF's in my game. Sometimes they would glitch placing the baby in the crib if the IF was still in the mailbox. Since I think IF's are creepy I've disallowed them from my games with a mod. :grin: That problem was solved.
On the other hand. Did you place the cribs or high chair with MOO on? That can cause issues for any object that needs to be used by sims. I only use MOO for planting or deco objects that will not be used by sims. I try to remember ( I'm old, memory is shot so sometimes I forget and then have issues ) to turn MOO off when I am done with plants or deco, so I don't inadvertently place chairs beds etc with it. Reset object as @igazor suggested is a great option. I have also resorted to sending the object to the household inventory and then bringing it out again if I'd recolored it and didn't want to 'buy' it again.
I think solving problems is one of the reasons that I stick with this beloved game as I am a problem solver and stubborn person. :grin: