The maximum number of submissions is 5. One of my earlier entries got rejected, that means I still have a slot left, after 4 other entries.

But it gives me this error.

Error: You have reached the maximum number of items in collection.

Rather than checking how many submissions have the user tried, it should check the accepted entries form a user.

Sometimes some users don't fully understand the theme, sometimes they're new, or there might be other reasons. If they submit 5 entries and all of them get rejected, (that too without any explicitly given reason), then they'll be locked out of the contest without any more chances.

Please look into this ASAP, so that users (esp new ones) won't get discouraged.