I, too, had problems with Catholic teachings about Mary, especially the Immcalulate Conception. This is where dogmatic development is used by the Catholic church to justify it's incorrect teachings. If all humans are born with Original Sin, then Mary MUST be made special or different in order to be pristine enough to carry our Lord in her womb. This sets up the Catholic church for setting her higher than just as Theotokos. Yes, sheis the holiest of saints and the ark of the new covenant, but by making her conception different from the rest of mankind is incorrect. If you want to read some truly concerning practices involving Mary, see
http://www.memorare.com/mary/totalcons.html In this devotions, Catholics are called on to "surrender oneself in the manner of a slave to Mary".
When I began inquiring into Orthodoxy, I had a real aversion to prayer to Mary because of things I witnessed in my own family. Since I have begun steeping in the Orthodox Church, I have come to love and honor her the way she was meant to be loved and honored.
kamikat