Major bug with tags, please make corrections


http://feeds2.feedburner.com/greentechgridtech
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gives feed items with tags like
news, entreprise, green it
However, for some obscure reason, Feedreader treats this as 1 single tag "news, entreprise, green it" instead of slicing it to 3 tags "news", "entreprise" and "green it".
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So when I built a smart feed "tag contains green it", it will not display this feed item.
This is a severe problem in tag management, making the purpose of smart feeds "tag contains..." pointless as some important items may be missing.
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Could you please immediately make corrections to fix this?
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Any reaction?

This is a major bug, immediate action required. Note: this also affects your paying customers, in case you wonder. Please could someone from the dev team take action?