Michaels Stores review: false signage

I found a shelving unit with signs all around that said 70% off. I made sure to only pick items off that shelving unit. I went to the check out and the scrapbook paper rang up at full price. I nicely explained how the sign said 70% off. She said maybe it was in the wrong shelf I said no there a whole bunch of the same item on the shelving unit. She took the 70% off the paper. However when I got home I realized the 4 packs of paper flowers that were also on the shelving unit were full price! Why put up a sign for 70% off if the registers are not fully programmed or the employees are not aware of what is on clearance!