A lot of sound IDs in TR1 and TR2 sound catalogs were not correctly remapped, and instead were left "as is" with the same ID. Example from TR2 Sounds.xml:
<sound id="247" name="SPLASH_SURFACE" ten="247" />
<sound id="248" name="WATERFALL1" ten="248" />
Here, sound IDs were just copypasted without manual review and remap. In some cases, this oversight resulted in incorrect asset conversion (e.g. TR2 mercenary with UZI, which uses Seth plasma shooting sound instead of UZI shooting sound).