Challenge invites and ongoing limits

Question

Is there a limit (other than the time limit) for how many challenges you can have invites to, and in your ongoing list?

Answer 1

yes there is.. it depends on the level you are...

/*no limit for invites maybe*/

Answer 2

there is limitations on number of invites on different levels, when I was level3 I had only 20 challenges but now in level 16 I got 100s of challanges.