Products/Cart/Order Status menu items issue

Hi,

I think it is since the last update of MarketPress 2.9.5.3 (on WP 4.0) that each time I save the main menu, where the shop entries "Products", "Shopping Cart" and "Order Status" reside, all these same three menu entries get added again.

The result is an ever growing list repeating the same three.

I can remove the entries that get added automatically but I cannot remove the original three entries. And each time, three new ones appear after saving...

Is this a known issue or is there a conflict going on on our site?