While some Events like train wreck spawn in an odd position, this is due to the Y coordinate missing. When an object is above an event missing this coordinate, it spawns in on an angle or on top of that item in an odd position. Sometimes it glitches in an object, just like the new firetrucks in the train wreck event at vavilovo, sometimes it's the terrain to be blamed but not always.
I have an event for an example. There supposed to be supply drops on ground level but the supply drops spawn on top of the event "parent." which is the Land_Wreck_C130J
<!--<pos x="1023.503967" z="10273.064453" a="0" y="297.899017" group="Zabolotye_Crash"/>-->
<group name="Zabolotye_Crash">
<child type="Land_Wreck_C130J" deloot="0" lootmax="15" lootmin="8" x="0" z="0" y="0" a="35.999977"/>
<child type="StaticObj_Misc_SupplyBox2_DE" deloot="0" lootmax="4" lootmin="2" x="9.7972" z="13.5264" a="18"/>
<child type="StaticObj_Misc_SupplyBox3_DE" deloot="0" lootmax="4" lootmin="2" x="5.0323" z="7.5107" a="315.000008"/>
<child type="StaticObj_Misc_SupplyBox1_DE" deloot="0" lootmax="4" lootmin="2" x="7.6268" z="12.3691" a="0"/>
<child type="StaticObj_Misc_SupplyBox1_DE" deloot="0" lootmax="4" lootmin="2" x="7.6932" z="7.2959" a="0"/>
<child type="StaticObj_Misc_SupplyBox2_DE" deloot="0" lootmax="4" lootmin="2" x="5.6262" z="10.5732" a="351"/>
<child type="StaticObj_Misc_SupplyBox3_DE" deloot="0" lootmax="4" lootmin="2" x="9.2563" z="10.3086" a="72.000015"/>
<child type="Wreck_UH1Y" spawnsecondary="false" x="1.7071" z="-6.8525" y="-7.8908" a="35.999977"/>
<child type="StaticObj_Rubble_DirtPile_Large" spawnsecondary="false" x="-5.5080" z="-11.1924" y="-4.8522" a="352.456768"/>
<child type="StaticObj_Rubble_DirtPile_Large" spawnsecondary="false" x="-7.5780" z="-8.4814" y="-5.0482" a="9"/>
<child type="StaticObj_Rubble_DirtPile_Large" spawnsecondary="false" x="-7.7491" z="-9.0918" y="-5.0323" a="297.000027"/>
<child type="StaticObj_Rubble_DirtPile_Large" spawnsecondary="false" x="-7.3596" z="-11.5332" y="-4.9731" a="9"/>
<child type="StaticObj_Rubble_DirtPile_Medium2" spawnsecondary="false" x="-5.6971" z="-5.8867" y="-5.2473" a="332.999947"/>
<child type="StaticObj_Rubble_DirtPile_Medium2" spawnsecondary="false" x="-4.8579" z="-4.6719" y="-5.2294" a="333"/>
<child type="StaticObj_Rubble_DirtPile_Medium2" spawnsecondary="false" x="-4.0065" z="-3.6094" y="-5.2345" a="342"/>
<child type="StaticObj_Rubble_DirtPile_Medium2" spawnsecondary="false" x="-3.2016" z="-2.2568" y="-5.2450" a="333"/>
<child type="StaticObj_Rubble_DirtPile_Medium2" spawnsecondary="false" x="-2.2382" z="-0.5674" y="-5.2880" a="333.787109"/>
<child type="StaticObj_Rubble_DirtPile_Medium2" spawnsecondary="false" x="-0.7391" z="0.9336" y="-5.2263" a="351"/>
<child type="StaticObj_Rubble_DirtPile_Medium2" spawnsecondary="false" x="0.2075" z="1.6836" y="-5.2088" a="0"/>
<child type="StaticObj_Rubble_DirtPile_Medium2" spawnsecondary="false" x="0.9440" z="2.7881" y="-5.1556" a="342"/>
<child type="StaticObj_Rubble_DirtPile_Medium2" spawnsecondary="false" x="1.5272" z="4.1465" y="-5.2009" a="333"/>
<child type="StaticObj_Rubble_DirtPile_Medium2" spawnsecondary="false" x="2.5131" z="5.4160" y="-5.2315" a="342"/>
<child type="StaticObj_Rubble_DirtPile_Medium2" spawnsecondary="false" x="3.5123" z="6.9023" y="-5.4149" a="333"/>
<child type="StaticObj_Rubble_DirtPile_Medium2" spawnsecondary="false" x="4.0721" z="7.9268" y="-5.5039" a="143.999893"/>
<child type="StaticObj_Rubble_DirtPile_Medium1" spawnsecondary="false" x="5.2613" z="9.1064" y="-5.4197" a="144.000046"/>
<child type="StaticObj_Rubble_DirtPile_Medium2" spawnsecondary="false" x="-4.2653" z="-10.1416" y="-4.9775" a="279.000046"/>
<child type="StaticObj_Rubble_DirtPile_Medium2" spawnsecondary="false" x="-4.4290" z="-8.3535" y="-5.1175" a="153.000076"/>
<child type="StaticObj_Rubble_DirtPile_Medium2" spawnsecondary="false" x="-3.5343" z="-7.1768" y="-5.1115" a="152.999908"/>
<child type="StaticObj_Rubble_DirtPile_Medium2" spawnsecondary="false" x="-2.8624" z="-6.1533" y="-5.0859" a="161.999863"/>
<child type="StaticObj_Rubble_DirtPile_Medium2" spawnsecondary="false" x="-1.9724" z="-4.9990" y="-5.0618" a="162.000092"/>
<child type="StaticObj_Rubble_DirtPile_Medium2" spawnsecondary="false" x="-1.0209" z="-4.2842" y="-5.0146" a="170.999863"/>
<child type="StaticObj_Rubble_DirtPile_Medium2" spawnsecondary="false" x="-0.0640" z="-3.1826" y="-4.9798" a="161.999863"/>
<child type="StaticObj_Rubble_DirtPile_Medium2" spawnsecondary="false" x="0.9976" z="-1.6094" y="-4.9633" a="152.999893"/>
<child type="StaticObj_Rubble_DirtPile_Medium2" spawnsecondary="false" x="1.7267" z="0.0176" y="-4.9882" a="134.999863"/>
<child type="StaticObj_Rubble_DirtPile_Medium2" spawnsecondary="false" x="2.3295" z="1.0342" y="-4.9944" a="170.999863"/>
<child type="StaticObj_Rubble_DirtPile_Medium2" spawnsecondary="false" x="3.1918" z="1.8691" y="-4.9759" a="161.999832"/>
<child type="StaticObj_Rubble_DirtPile_Medium2" spawnsecondary="false" x="4.1353" z="3.0107" y="-5.0449" a="170.999863"/>
<child type="StaticObj_Rubble_DirtPile_Medium2" spawnsecondary="false" x="5.0245" z="4.1084" y="-5.1086" a="161.999863"/>
<child type="StaticObj_Rubble_DirtPile_Medium2" spawnsecondary="false" x="6.3481" z="5.1523" y="-5.2480" a="342"/>
<child type="StaticObj_Rubble_DirtPile_Medium1" spawnsecondary="false" x="7.1934" z="6.2266" y="-5.1218" a="134.999893"/>
</group>