if she is not remembering the spelling try some different approaches when she practises for the test. e.g.
write the letters in a sand or salt tray (baking tray with handful of table salt or sand in it)
raninbow write the words - write the word really big in red say, then go over in yellow, blue, green etc.
Do you do look, cover write check?
Write the words up big and put them up on the back of the fronf door / opposite the toilet. Highlight any spelling pattern
get her to to spell out the words and record her, then play it back to her
get her to throw a beanbag up in the air as she says each letter, or skip as she says each letter.
little and every day is the key.
not all of these will be good for your child, it depends if she is a visual, aural or kinestetic (sp) learner.
Sorry, if you have heard all this before.
I would worry because i am a mother and that seems to be our default state but you should not really. Her spelling looks fine for a 6 year old.