Do approved Twitter Card data labels become static?


My site generates conditional labels based on the content of the page. For example if a price is per square foot, Twitter:LABEL1 is “SQ FOOT” on Product Twitter Card. If a frame option is available then the same label might say, “FRAME OPTION.” What I have noticed is that the labels and even the title meta data differs from what is displayed on the Validator page. It also appears that the image:WIDTH and image:HEIGHT tags are ignored. Compare the tweet below with the corresponding meta data.
<meta name="twitter:card" content="product" />
<meta name="twitter:site" content="@clinicalposters" />
<meta name="twitter:domain" content="" />
<meta name="twitter:creator" content="@clinicalposters" />
<meta name="twitter:url" content="" />
<meta name="twitter:description" content="Poster illustrates 1st thru 4th-degree skin burns and Rule of Nines for dermatology, trauma and wound centers." />
<meta name="twitter:title" content="Skin Burn Severity anatomy poster" />
<meta name="twitter:image:src" content="" />
<meta name="twitter:data1" content="From $24.99 USD">
<meta name="twitter:label1" content="VARIOUS FINISHES AVAILABLE">
<meta name="twitter:data2" content="Dermatology">
<meta name="twitter:label2" content="CATEGORY">
<meta name="twitter:image:width" content="108" />
<meta name="twitter:image:height" content="140" />


To be clear, I really prefer dynamic labels. If this isn’t possible, please indicate how to alter static labels to something more neutral.


Tried clearing browser cache to no avail. Apparently, certain Twitter Card parameters for a specific page are cached on the Twitter servers for a period of time (24 hours?). A tweet the next day from the same page displays updates. I shared this anomaly on my blog.