Build # and Expiration

I received a notice saying my subscription expires in 5 days after only a month purchase and I noticed a change in the build date in the lower left corner of the second screen, which should stay same as original or i thought. After contacting support, the fix seem to be to re-purchase a product I already purchased. Any one else experienced this.

W, Which AVG product are you actually referring to?.
AVG Guru

W, Which AVG product are you actually referring to?.
AVG Guru