Also, there is an immense--really an infinite gulf--between how we pray to the saints and pray to God. Our highest prayer is not the personal prayers we say every day, but rather the Mass...and the Mass is always offered to God the Father and never ever ever to any creating being, and that includes the angels, Mary, and the saints.
Yes you are. You are praying to them as if they are omniscient. Otherwise, they would not have any idea that you are praying to them.
If a million are praying to them, how do they sort it all out? How do they know when one is praying at 6am and another at 2:30 pm?
If you had a million talking to you could you keep it straight? Would you know the 2000 who were voicing your name at 2:30 in the morning?
Why wouldn't you know? Because you're not omniscient. You are ascribing omniscience to them.