Di Fi's Bill Contradiction?

Anyone else confused by this? I've put the confusing parts in Red Text.


The Assault Weapons Ban of 2013 has two principal goals:

First, the bill prohibits the sale, manufacture, transfer and importation of 157 of the most commonly-owned military-style assault weapons. It also bans an additional group of assault weapons that can accept a detachable ammunition magazine and have one or more military characteristics.
Second, the bill bans large-capacity magazines and other ammunition feeding devices that hold more than 10 rounds of ammunition. These devices allow shooters to fire numerous rounds in rapid succession without having to stop and reload.
The legislation also protects the rights of law-abiding citizens who use guns for hunting, household defense or legitimate recreational purposes. The Assault Weapons Ban includes a grandfather clause that specifically exempts all assault weapons lawfully possessed at the date of enactment from the ban. The legislation also excludes:

More than 2,200 legitimate hunting and sporting rifles by specific make and model;
Any gun manually operated by bolt, pump, lever or slide action; and
Weapons used by military, law enforcement and retired law enforcement.
Other key provisions in the bill:

Requires background checks on all future transfers of assault weapons covered by the legislation, including sale, trade and gift;
Requires that grandfathered assault weapons be stored safely using a secure gun storage or safety device in order to keep them away from prohibited persons; and
Prohibits the sale or transfer of high-capacity ammunition feeding devices currently in existence.