isn't it possible that someone else suggets same site during this time then?
Absolutely possible.
is what heppends with the description?
The newer submission usuallyoverwrites the older submission, thus wiping out the original suggested description. Buyt that really doesn't matter as we rarely use the suggested descriptino.
As I understand this, many editors don't like multiple submissions and leaves those sites, right?
No, we don't cate for multiple submissions, but......
....multiple submissions of hte same site to the saem category really don't impact us.
....multipe submissions of the same site to difference categories is a major pain, but we have ways of telling the difference between someone intentionally abusing the directory and the wonderful serindipity of two different people thinking the same site would be a nice addition to the directory.
How do I find out if a site is already suggested?
You cannot, unless you are the submitter and know what, where and when, and only want a status check.
By the way, this even impact editors. When we suggest a site we found, into a category where we don't have permission to edit, we have no way of knowing if it is already sitting there.