Hi N.,
My disclaimer is that I'm currently *going to UCF* to become a speech language pathologist, so I'm only a student. However, I've taken the required classes on childhood language development, and I have an inkling of what could be going on. Believe it or not, speech therapists deal with a lot of issues kids have like the one you have described.
What you are describing could be a warning sign of problems with the storage and recall of visual stimuli. In other words, she has a hard time recognizing highly visual stimuli, and it could be a precursor to problems later on with memory and comprehension.
Your best bet is to call the elementary school she is zoned for and ask to speak with the speech therapist. When you speak to her/him, ask for a referral for a speech and language screening. Most times the cost for these are very inexpensive.
I hope this helps you, N.. I've learned the hard way over the past two years that trusting my gut is key to knowing when something isn't right and not just basing my feelings on what everyone around me says to reassure me.
Warmly,
A.