This is due to the limits on good.
Wellpa has 800 seconds per hour - that's how long we can exchange data with this site. All the time takes away the setting of the exchange of leftovers and products.
You need to set the exchange limits so that the total is less than 800
For example, to export goods, set 400 seconds
To export the rest - 200 sec
and 200 left to exchange orders
Limits are configured in action
+ you need to check the box (so as not to waste time in vain)
http://i.imgur.com/VeSG5zQ.pngThis is for exporting goods
This is for exporting leftovers
http://i.imgur.com/GUNaCCn.pngAnd wait 1-2 hours until the data is applied. After a while everything should start working correctly.