I had the Sanus stands for the 300's, but after getting new sofas, they were tk short for the taller furniture. I ordered two Sonos OEM Era 300 Stands. I have contacted support about the following issue and they asked me for and order number, which I have sent to them twice and no response. Where the support shaft (long shaft that goes from the base to the top support bracket) have about a 1/2" of play where the shaft cam be rotated back and forth ok the floor base. Is this normal for these stands or did I by blind luck get two stands with the same issue? Thanks in advance for any info