Why are feeds so inconsistent?

[type2diabetes]

Take the NvidiaDriverBridge for example, Html shows latest driver as 581.29, but Atom shows 581.15 and Mrss is 581.08.. why?

[dvikan]

different cache times. additionally if you are using rss-bridge.org they have harcoded cache TTLs of 8h

each format (mrss, atom, html) have separate cache key