Weird play description

Well I opened up the Plays file to create some new plays and I noticed a lot of them look funny. I have the plays modification file with the 200+ extra plays added. For example
<Play Freq="1" Formation="ProSet" Name="LWR Quick Screen" Type="Pass" OffScheme="ProStyle" PassPref="Short" PassTargetPref="Outside" RBRole="Blocking" TERole="Blocking" BaseForm ="true">
<Slot ID="0">
<Path>
<Action Type="Move" DeltaX="0" DeltaY="-9" Delay="0"></Action>
</Path>
</Slot>
<Slot ID="1" Pct="0">
<Path>
<Action Type="Pass Block" />
</Path>
</Slot>
<Slot ID="2" Pct="0">
<Path>
<Action Type="Move" DeltaX="24" DeltaY="3" Delay="2"></Action>
</Path>
</Slot>
<Slot ID="3" Pct="0">
<Path>
<Action Type="Move" DeltaX="-24" DeltaY="3" Delay="2"></Action>
</Path>
</Slot>
<Slot ID="4" Pct="90">
<Path>
<Action Type="Move" DeltaX="0" DeltaY="-3" Delay="0"></Action>
<Action Type="Move" DeltaX="9" DeltaY="0" Delay="0"></Action>
</Path>
</Slot>
<Slot ID="5" Pct="10">
<Path>
<Action Type="Move" DeltaX="-30" DeltaY="30" Delay="0"></Action>
</Path>
</Slot>
<Slot ID="6">
<Path>
<Action Type="Move" DeltaX="0" DeltaY="-3" Delay="0"></Action>
</Path>
</Slot>
<Slot ID="7">
<Path>
<Action Type="Move" DeltaX="0" DeltaY="-3" Delay="0"></Action>
</Path>
</Slot>
<Slot ID="8">
<Path>
<Action Type="Move" DeltaX="0" DeltaY="3" Delay="0"></Action>
<Action Type="Move" DeltaX="33" DeltaY="0" Delay="0"></Action>
<Action Type="Move" DeltaX="0" DeltaY="6" Delay="0"></Action>
</Path>
</Slot>
<Slot ID="9">
<Path>
<Action Type="Move" DeltaX="0" DeltaY="3" Delay="0"></Action>
<Action Type="Move" DeltaX="33" DeltaY="0" Delay="0"></Action>
<Action Type="Move" DeltaX="0" DeltaY="6" Delay="0"></Action>
</Path>
</Slot>
<Slot ID="10">
<Path>
<Action Type="Move" DeltaX="0" DeltaY="-3" Delay="0"></Action>
</Path>
what is this DeltaX and Delta Y stuff? Are the plays supposed to look like that? It's only the offensive plays too. Is that zone plays to have the linemen move to a certain area of the field on the playcall? or do I have to go back and change every little action path to run block left, pass block tackle, etc
<Play Freq="1" Formation="ProSet" Name="LWR Quick Screen" Type="Pass" OffScheme="ProStyle" PassPref="Short" PassTargetPref="Outside" RBRole="Blocking" TERole="Blocking" BaseForm ="true">
<Slot ID="0">
<Path>
<Action Type="Move" DeltaX="0" DeltaY="-9" Delay="0"></Action>
</Path>
</Slot>
<Slot ID="1" Pct="0">
<Path>
<Action Type="Pass Block" />
</Path>
</Slot>
<Slot ID="2" Pct="0">
<Path>
<Action Type="Move" DeltaX="24" DeltaY="3" Delay="2"></Action>
</Path>
</Slot>
<Slot ID="3" Pct="0">
<Path>
<Action Type="Move" DeltaX="-24" DeltaY="3" Delay="2"></Action>
</Path>
</Slot>
<Slot ID="4" Pct="90">
<Path>
<Action Type="Move" DeltaX="0" DeltaY="-3" Delay="0"></Action>
<Action Type="Move" DeltaX="9" DeltaY="0" Delay="0"></Action>
</Path>
</Slot>
<Slot ID="5" Pct="10">
<Path>
<Action Type="Move" DeltaX="-30" DeltaY="30" Delay="0"></Action>
</Path>
</Slot>
<Slot ID="6">
<Path>
<Action Type="Move" DeltaX="0" DeltaY="-3" Delay="0"></Action>
</Path>
</Slot>
<Slot ID="7">
<Path>
<Action Type="Move" DeltaX="0" DeltaY="-3" Delay="0"></Action>
</Path>
</Slot>
<Slot ID="8">
<Path>
<Action Type="Move" DeltaX="0" DeltaY="3" Delay="0"></Action>
<Action Type="Move" DeltaX="33" DeltaY="0" Delay="0"></Action>
<Action Type="Move" DeltaX="0" DeltaY="6" Delay="0"></Action>
</Path>
</Slot>
<Slot ID="9">
<Path>
<Action Type="Move" DeltaX="0" DeltaY="3" Delay="0"></Action>
<Action Type="Move" DeltaX="33" DeltaY="0" Delay="0"></Action>
<Action Type="Move" DeltaX="0" DeltaY="6" Delay="0"></Action>
</Path>
</Slot>
<Slot ID="10">
<Path>
<Action Type="Move" DeltaX="0" DeltaY="-3" Delay="0"></Action>
</Path>
what is this DeltaX and Delta Y stuff? Are the plays supposed to look like that? It's only the offensive plays too. Is that zone plays to have the linemen move to a certain area of the field on the playcall? or do I have to go back and change every little action path to run block left, pass block tackle, etc