The Beat Yesterday Pro Run/Walk challenges

Hello,

The Beat Yesterday Expert/Pro, Run/Walk challenges, do they reset if you start and then stop before completing. Meaning if you do a run or walk and then 6 days go by and then you do a run or walk does it start the counter over?  What happens for each challenge i.e., you have to complete 5 out of 7 days and 10 out of 14 days.

Let's say you do a walk to complete a weekend walk challenge.  That would start both of the expert and pro Beat yesterday's challenges.  If you do another walk 6 days later, what happens to the started challenges?