Is unsour sour cream too new or too old? My supermarket only has one supplier of sour cream, so I always buy it. It appears to be made by a small company.

All last year, when I purchased the product, it appeared like any sour cream you can purchase in the US. But during the last 3 times, the taste and texture was different. First, it was not sour, the nearest flavor I can imagine would be cottage cheese, but not so sweet. Second, the texture was quite unusual. Rather than having the usual creamy texture, this was grainy, as I imagine sour cream would look if one mixed in some sand.

The date I purchased the cream was 10 days after the produced date.


Is this taste and texture and indication that the sour cream is too old?
Or perhaps an indication that the sour cream needs to age more to become sour?
Or just a different style of sour cream?
It sounds like the sour cream was frozen and thawed.