Re: too much solids, not enough breastmilk
I have no personal experience in this yet, but have been cautioned that until closer to 1 year old, baby should be breastfed prior to offering solids - nurse first and offer again after feeding solids.
Really, for the first few months on solids a little one should only be getting 1-2 small meals of solids each day. Multiple full containers of baby food for an almost-7 month old seems like a lot (even considering my formula fed niece and nephew). Remember that breastmilk is your baby's perfect food for the first year and beyond, and solids should be complementary, NOT the backbone of an infant's diet.
Many of the guidelines for solid food feeding assumes that a baby starts solids at 4 months, is formula fed, and will be fully weaned to solids by 12 months. The recommendations are for much larger meals than a baby really needs if s/he is still nursing frequently, and solids can quickly displace nursing. Juice is not necessary at this age and is really empty calories that fills baby up - you should nurse or offer EBM at that time instead. If you feel that baby needs nutrients from fruit, offer fruit at a meal instead of juice.
Here is the LLLI FAQ on first foods - you might find it helpful.
Katie - mom to Lily, 8/5/2010