They say to raise the level of the crib or to get as close to the mattress as possible, when laying your child down. As their body senses you lowering them, this at times wakes them up. This should be attempted when fully asleep though. I've tried this, however my little one seems to fake her sleep. lol I can't say you're spoiling them with the sleeping clenches at the moment. Babies don't have the ability to fall asleep themselves. Also, you need to remember your baby has been used to being warm, secure and tightly held inside of you. It's still early, also a learning process.
Some babies are fine with going to sleep in their crib...most aren't.
I find it's my time to wined down when I know she's fully asleep. Even if I am holding her during the whole time. I also sit on my bed and gently place her on a pillow..Only as I observe, as babies shouldn't be sleeping on soft/cushioned surfaces. The whole time I sit by her and when she stirs I pat her to let her know Mummy is there. She usually drops back off to sleep.