Fits but does not last quite as long

We have now installed by rotating Flex the third filter and this time decided to go because of the good experiences for the double pack.
The filters fit properly for our identification DKF24 (an old whirlpool cooker). The exchange itself is done within 30 seconds.
Two points have but this time led to a deduction of points:
1) The extractor (fan) does not last as long as expected, despite rather low cooking power. After 6-7 months you can clearly see that the odors are not as good "processed". At the very beginning we had to replace after just under a year.
2) The delivery of Amazon untypical only with a thin plastic film in big cardboard (we ordered several things at once). The danger here that pierce the film and thus the filter is damaged, is very large. The second filter I have now placed in the remaining Erstschachtel so as to avoid a mishap. The previous deliveries were always in a cardboard packaging.

Conclusion:
The filter does the job and is for my old cooker as done.